{"id":20125,"date":"2026-08-31T00:00:00","date_gmt":"2026-08-31T00:00:00","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=20125"},"modified":"2026-09-04T17:01:53","modified_gmt":"2026-09-04T17:01:53","slug":"core-web-vitals-guide","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/core-web-vitals-guide\/","title":{"rendered":"Core Web Vitals\u6539\u5584\u30ac\u30a4\u30c9\uff5cLCP\u30fbINP\u30fbCLS\u3092\u5b9f\u6e2c\u3057\u3066\u76f4\u3059\u624b\u9806"},"content":{"rendered":"<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-left\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.40.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\"><p><strong>PageSpeed Insights\u3067\u6e2c\u3063\u305f\u3089\u8d64\u3044\u6570\u5b57\u3060\u3089\u3051\u3067\u3057\u305f\u2026\u3002\u3069\u3053\u304b\u3089\u76f4\u305b\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/strong><\/p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"swell-block-balloon\">\n<div class=\"c-balloon -bln-right\" data-col=\"gray\">\n<div class=\"c-balloon__icon -square\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div>\n<div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\"><p><strong>\u5168\u90e8\u3044\u3063\u307a\u3093\u306b\u76f4\u305d\u3046\u3068\u3057\u306a\u3044\u3053\u3068\u3002<strong>LCP\u30fbINP\u30fbCLS\u306e3\u3064<\/strong>\u3060\u3051\u898b\u308c\u3070\u3044\u3044\u3002\u3057\u304b\u3082\u539f\u56e0\u306f\u6bce\u56de\u3060\u3044\u305f\u3044\u540c\u3058\u5834\u6240\u306b\u3042\u308b\u3002\u5b9f\u6e2c\u3057\u3066\u3001\u52b9\u304f\u9806\u306b\u6f70\u3057\u3066\u3044\u3053\u3046\u3002<\/strong><\/p><span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">Core Web Vitals\uff08\u30b3\u30a2\u30a6\u30a7\u30d6\u30d0\u30a4\u30bf\u30eb\uff09\u306f\u3001Google\u304c\u5b9a\u3081\u308b<span class=\"swl-marker mark_yellow\">\u30da\u30fc\u30b8\u4f53\u9a13\u306e\u6307\u6a19<\/span>\u3067\u3059\u3002\u691c\u7d22\u9806\u4f4d\u306e\u8981\u7d20\u306e\u3072\u3068\u3064\u3067\u3042\u308a\u3001\u305d\u308c\u4ee5\u4e0a\u306b\u96e2\u8131\u7387\u3078\u76f4\u7d50\u3057\u307e\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u6307\u6a19\u306f3\u3064\u3060\u3051\u3067\u3059\u3002\u8868\u793a\u306e\u901f\u3055\uff08LCP\uff09\u3001\u64cd\u4f5c\u3078\u306e\u53cd\u5fdc\uff08INP\uff09\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u305a\u308c\uff08CLS\uff09\u3002\u305d\u308c\u305e\u308c\u539f\u56e0\u306b\u306a\u308a\u3084\u3059\u3044\u7b87\u6240\u304c\u6c7a\u307e\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u9806\u756a\u306b\u6f70\u305b\u3070\u78ba\u5b9f\u306b\u6539\u5584\u3057\u307e\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u307e\u305a\u6b63\u3057\u3044\u6e2c\u308a\u65b9\u3092\u793a\u3057\u30013\u6307\u6a19\u305d\u308c\u305e\u308c\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u3001WordPress\u3067\u306e\u5177\u4f53\u7684\u306a\u8a2d\u5b9a\u3001\u6539\u5584\u5f8c\u306e\u78ba\u8a8d\u65b9\u6cd5\u307e\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Core Web Vitals\u306e3\u6307\u6a19\u3068\u5408\u683c\u30e9\u30a4\u30f3<\/li>\n<li>\u5b9f\u6e2c\u306e\u65b9\u6cd5\uff08\u30e9\u30dc\u30c7\u30fc\u30bf\u3068\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf\u306e\u9055\u3044\uff09<\/li>\n<li>LCP\uff08\u8868\u793a\u306e\u901f\u3055\uff09\u3092\u6539\u5584\u3059\u308b<\/li>\n<li>INP\uff08\u64cd\u4f5c\u3078\u306e\u53cd\u5fdc\uff09\u3092\u6539\u5584\u3059\u308b<\/li>\n<li>CLS\uff08\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u305a\u308c\uff09\u3092\u6539\u5584\u3059\u308b<\/li>\n<li>\u753b\u50cf\u306e\u6700\u9069\u5316\u304c\u6700\u3082\u52b9\u304f\u7406\u7531<\/li>\n<li>WordPress\u3067\u306e\u5177\u4f53\u7684\u306a\u8a2d\u5b9a<\/li>\n<li>\u3084\u308a\u3059\u304e\u308b\u3068\u9006\u52b9\u679c\u306b\u306a\u308b\u65bd\u7b56<\/li>\n<li>\u6539\u5584\u5f8c\u306e\u78ba\u8a8d\u3068\u7d99\u7d9a\u7684\u306a\u76e3\u8996<\/li>\n<li>\u512a\u5148\u9806\u4f4d\u306e\u3064\u3051\u65b9<\/li>\n<\/ul>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">3\u3064\u306e\u6307\u6a19\u3068\u5408\u683c\u30e9\u30a4\u30f3<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-01.jpg\" alt=\"3\u3064\u306e\u6307\u6a19\u3068\u5408\u683c\u30e9\u30a4\u30f3\" class=\"wp-image-20829\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-01.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-01-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-01-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">\u899a\u3048\u308b\u306e\u306f\u3053\u306e\u8868\u3060\u3051\u3067\u3059\u3002\u6570\u5024\u306e\u610f\u5473\u3068\u3001\u4f55\u304c\u539f\u56e0\u306b\u306a\u308a\u3084\u3059\u3044\u304b\u3092\u30bb\u30c3\u30c8\u3067\u62bc\u3055\u3048\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u6307\u6a19<\/th><th>\u6e2c\u308b\u3082\u306e<\/th><th>\u826f\u597d<\/th><th>\u8981\u6539\u5584<\/th><th>\u4e3b\u306a\u539f\u56e0<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>LCP<\/td><td>\u4e3b\u8981\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u8868\u793a\u6642\u9593<\/td><td>2.5\u79d2\u4ee5\u4e0b<\/td><td>4.0\u79d2\u8d85<\/td><td>\u753b\u50cf\u30fb\u30b5\u30fc\u30d0\u30fc\u5fdc\u7b54<\/td><\/tr>\n<tr><td>INP<\/td><td>\u64cd\u4f5c\u3057\u3066\u304b\u3089\u53cd\u5fdc\u3059\u308b\u307e\u3067<\/td><td>200ms\u4ee5\u4e0b<\/td><td>500ms\u8d85<\/td><td>JavaScript\u306e\u51e6\u7406<\/td><\/tr>\n<tr><td>CLS<\/td><td>\u8868\u793a\u4e2d\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u305a\u308c<\/td><td>0.1\u4ee5\u4e0b<\/td><td>0.25\u8d85<\/td><td>\u30b5\u30a4\u30ba\u672a\u6307\u5b9a\u306e\u8981\u7d20<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u5408\u683c\u306e\u5224\u5b9a\u306f<span class=\"swl-marker mark_yellow\">\u5168\u30da\u30fc\u30b8\u306e75\u30d1\u30fc\u30bb\u30f3\u30bf\u30a4\u30eb<\/span>\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u3064\u307e\u308a4\u5206\u306e3\u306e\u8a2a\u554f\u3067\u57fa\u6e96\u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308a\u3001\u4e00\u90e8\u306e\u30da\u30fc\u30b8\u3060\u3051\u901f\u304f\u3066\u3082\u8a55\u4fa1\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u306a\u304a\u30012024\u5e743\u6708\u306bFID\uff08\u521d\u56de\u5165\u529b\u9045\u5ef6\uff09\u304c\u5ec3\u6b62\u3055\u308c\u3001INP\u306b\u7f6e\u304d\u63db\u308f\u308a\u307e\u3057\u305f\u3002\u53e4\u3044\u8a18\u4e8b\u3067\u306fFID\u306e\u89e3\u8aac\u304c\u6b8b\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u73fe\u5728\u306f\u898b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u5b9f\u6e2c\u306e\u65b9\u6cd5<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-02.jpg\" alt=\"\u5b9f\u6e2c\u306e\u65b9\u6cd5\" class=\"wp-image-20830\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-02.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-02-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-02-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">\u6e2c\u5b9a\u306b\u306f2\u7a2e\u985e\u3042\u308a\u3001\u6df7\u540c\u3059\u308b\u3068\u300c\u76f4\u3057\u305f\u306e\u306b\u6570\u5024\u304c\u5909\u308f\u3089\u306a\u3044\u300d\u3068\u8aa4\u89e3\u3057\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u7a2e\u985e<\/th><th>\u4f55\u306e\u30c7\u30fc\u30bf\u304b<\/th><th>\u30c4\u30fc\u30eb<\/th><th>\u53cd\u6620\u901f\u5ea6<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30e9\u30dc\u30c7\u30fc\u30bf<\/td><td>\u6e2c\u5b9a\u74b0\u5883\u3067\u306e1\u56de\u306e\u7d50\u679c<\/td><td>Lighthouse \/ PageSpeed Insights<\/td><td>\u5373\u6642<\/td><\/tr>\n<tr><td>\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf<\/td><td>\u5b9f\u969b\u306e\u8a2a\u554f\u800528\u65e5\u5206\u306e\u96c6\u8a08<\/td><td>Search Console \/ CrUX<\/td><td>\u7d0428\u65e5<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u6539\u5584\u4f5c\u696d\u4e2d\u306f\u30e9\u30dc\u30c7\u30fc\u30bf\u3067\u78ba\u8a8d\u3057\u3001\u6700\u7d42\u7684\u306a\u5408\u5426\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf\u3067\u5224\u65ad\u3057\u307e\u3059\u3002\u4fee\u6b63\u304c\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf\u306b\u53cd\u6620\u3055\u308c\u308b\u307e\u3067\u6700\u592728\u65e5\u304b\u304b\u308b\u305f\u3081\u3001\u7126\u3089\u305a\u5f85\u3061\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30d6\u30e9\u30a6\u30b6\u3067\u5b9f\u6e2c\u3059\u308b<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"\u624b\u9806\"><code>Chrome DevTools \u2192 Lighthouse \u30bf\u30d6\n \u2192 \u30e2\u30fc\u30c9\u306f\u300c\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u300d\u3001\u30c7\u30d0\u30a4\u30b9\u306f\u300c\u30e2\u30d0\u30a4\u30eb\u300d\u3092\u9078\u3076\n \u2192 \u300c\u30da\u30fc\u30b8\u5206\u6790\u3092\u958b\u59cb\u300d\n\n\u203b \u62e1\u5f35\u6a5f\u80fd\u306e\u5f71\u97ff\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30b7\u30fc\u30af\u30ec\u30c3\u30c8\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u6e2c\u308b<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ \u5b9f\u969b\u306e\u8a2a\u554f\u8005\u306e\u5024\u3092\u81ea\u5206\u3067\u8a08\u6e2c\u3059\u308b\uff08web-vitals\u30e9\u30a4\u30d6\u30e9\u30ea\uff09\nimport { onLCP, onINP, onCLS } from 'web-vitals';\n\nconst send = ({ name, value, rating }) =&gt; {\n  console.log(name, Math.round(value), rating);\n  \/\/ GA4\u3078\u9001\u308b\u5834\u5408\n  gtag('event', name, { value: Math.round(value), metric_rating: rating });\n};\n\nonLCP(send);\nonINP(send);\nonCLS(send);<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u5b9f\u6e2c\u3067\u6700\u3082\u91cd\u8981\u306a\u306e\u306f<span class=\"swl-marker mark_yellow\">\u30e2\u30d0\u30a4\u30eb\u3067\u6e2c\u308b\u3053\u3068<\/span>\u3067\u3059\u3002PC\u306e\u56de\u7dda\u3068\u6027\u80fd\u3067\u306f\u554f\u984c\u304c\u8868\u9762\u5316\u305b\u305a\u3001\u5b9f\u969b\u306e\u5229\u7528\u74b0\u5883\u3068\u4e56\u96e2\u3057\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">LCP\uff08\u8868\u793a\u306e\u901f\u3055\uff09\u3092\u6539\u5584\u3059\u308b<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-03.jpg\" alt=\"LCP\uff08\u8868\u793a\u306e\u901f\u3055\uff09\u3092\u6539\u5584\u3059\u308b\" class=\"wp-image-20831\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-03.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-03-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-03-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">\u30da\u30fc\u30b8\u3067\u6700\u3082\u5927\u304d\u306a\u8981\u7d20\u304c\u8868\u793a\u3055\u308c\u308b\u307e\u3067\u306e\u6642\u9593\u3067\u3059\u3002\u591a\u304f\u306e\u30b5\u30a4\u30c8\u3067\u306f\u3001\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u304b\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u304c\u5bfe\u8c61\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u307e\u305a\u5bfe\u8c61\u8981\u7d20\u3092\u7279\u5b9a\u3059\u308b<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"\u624b\u9806\"><code>DevTools \u2192 Performance \u2192 \u8a18\u9332 \u2192 LCP\u306e\u30de\u30fc\u30ab\u30fc\u3092\u30af\u30ea\u30c3\u30af\n \u307e\u305f\u306f Lighthouse \u306e\u300c\u6700\u5927\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u63cf\u753b\u8981\u7d20\u300d\u6b04\u3092\u898b\u308b<\/code><\/pre><\/div>\n\n<h3 class=\"wp-block-heading\">\u753b\u50cf\u304c\u5bfe\u8c61\u306e\u5834\u5408<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- \u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u306f\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3057\u306a\u3044 --&gt;\n&lt;img src=\"\/img\/hero.webp\"\n     width=\"1200\" height=\"630\"\n     alt=\"\u8aac\u660e\"\n     fetchpriority=\"high\"&gt;\n\n&lt;!-- \u9006\u306b\u3001\u4e0b\u90e8\u306e\u753b\u50cf\u306f\u5fc5\u305a\u9045\u5ef6\u3055\u305b\u308b --&gt;\n&lt;img src=\"\/img\/section.webp\" width=\"800\" height=\"450\" alt=\"\u8aac\u660e\" loading=\"lazy\"&gt;<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u304c\u3001<span class=\"swl-marker mark_yellow\">\u5168\u753b\u50cf\u306b loading=&quot;lazy&quot; \u3092\u4ed8\u3051\u308b\u3053\u3068<\/span>\u3067\u3059\u3002\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u307e\u3067\u9045\u5ef6\u3055\u305b\u308b\u3068\u3001LCP\u304c\u78ba\u5b9f\u306b\u60aa\u5316\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- \u91cd\u8981\u306a\u753b\u50cf\u3092\u5148\u8aad\u307f\u3059\u308b --&gt;\n&lt;link rel=\"preload\" as=\"image\" href=\"\/img\/hero.webp\" fetchpriority=\"high\"&gt;\n\n&lt;!-- \u5916\u90e8\u30c9\u30e1\u30a4\u30f3\u3078\u306e\u63a5\u7d9a\u3092\u5148\u306b\u78ba\u7acb\u3059\u308b --&gt;\n&lt;link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin&gt;<\/code><\/pre><\/div>\n\n<h3 class=\"wp-block-heading\">\u30c6\u30ad\u30b9\u30c8\u304c\u5bfe\u8c61\u306e\u5834\u5408<\/h3>\n\n<p class=\"wp-block-paragraph\">Web\u30d5\u30a9\u30f3\u30c8\u306e\u8aad\u307f\u8fbc\u307f\u5f85\u3061\u3067\u6587\u5b57\u304c\u8868\u793a\u3055\u308c\u306a\u3044\u72b6\u614b\u304c\u7591\u308f\u308c\u307e\u3059\u3002<code>font-display<\/code>\u3067\u5148\u306b\u4ee3\u66ff\u30d5\u30a9\u30f3\u30c8\u3092\u898b\u305b\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>@font-face {\n  font-family: 'MyFont';\n  src: url('\/fonts\/myfont.woff2') format('woff2');\n  font-display: swap;      \/* \u5148\u306b\u4ee3\u66ff\u30d5\u30a9\u30f3\u30c8\u3067\u8868\u793a\u3059\u308b *\/\n}<\/code><\/pre><\/div>\n\n<h3 class=\"wp-block-heading\">\u30b5\u30fc\u30d0\u30fc\u5fdc\u7b54\u304c\u9045\u3044\u5834\u5408<\/h3>\n\n<ul class=\"wp-block-list\">\n<li>TTFB\uff08\u6700\u521d\u306e1\u30d0\u30a4\u30c8\u307e\u3067\uff09\u304c0.8\u79d2\u3092\u8d85\u3048\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6709\u52b9\u306b\u3059\u308b\uff08WordPress\u306a\u3089\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\uff09<\/li>\n<li>\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u6574\u7406\u3059\u308b\u3002\u6709\u52b9\u5316\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u91cd\u3044\u3082\u306e\u304c\u3042\u308b<\/li>\n<li>\u30b5\u30fc\u30d0\u30fc\u306e\u30d7\u30e9\u30f3\u3084PHP\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u898b\u76f4\u3059<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">INP\uff08\u64cd\u4f5c\u3078\u306e\u53cd\u5fdc\uff09\u3092\u6539\u5584\u3059\u308b<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-04.jpg\" alt=\"INP\uff08\u64cd\u4f5c\u3078\u306e\u53cd\u5fdc\uff09\u3092\u6539\u5584\u3059\u308b\" class=\"wp-image-20832\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-04.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-04-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/core-web-vitals-section-04-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u304b\u3089\u753b\u9762\u304c\u53cd\u5fdc\u3059\u308b\u307e\u3067\u306e\u6642\u9593\u3067\u3059\u3002\u539f\u56e0\u306f\u307b\u307cJavaScript\u306e\u51e6\u7406\u306b\u96c6\u4e2d\u3057\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ \u60aa\u3044\u4f8b\uff1a\u30af\u30ea\u30c3\u30af\u6642\u306b\u91cd\u3044\u51e6\u7406\u3092\u540c\u671f\u5b9f\u884c\u3059\u308b\nbutton.addEventListener('click', () =&gt; {\n  const result = heavyCalculation(largeArray);   \/\/ \u6570\u767ems\u5360\u6709\u3059\u308b\n  render(result);\n});\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u5148\u306b\u753b\u9762\u3092\u53cd\u5fdc\u3055\u305b\u3001\u91cd\u3044\u51e6\u7406\u3092\u5f8c\u308d\u3078\u56de\u3059\nbutton.addEventListener('click', () =&gt; {\n  showLoadingState();                 \/\/ \u5373\u5ea7\u306b\u53cd\u5fdc\u3092\u8fd4\u3059\n\n  requestAnimationFrame(() =&gt; {\n    setTimeout(() =&gt; {\n      const result = heavyCalculation(largeArray);\n      render(result);\n    }, 0);\n  });\n});<\/code><\/pre><\/div>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u539f\u56e0<\/th><th>\u75c7\u72b6<\/th><th>\u5bfe\u51e6<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u9577\u3044JavaScript\u51e6\u7406<\/td><td>\u62bc\u3057\u3066\u3082\u53cd\u5fdc\u3057\u306a\u3044<\/td><td>\u51e6\u7406\u3092\u5206\u5272\u30fb\u9045\u5ef6\u3055\u305b\u308b<\/td><\/tr>\n<tr><td>\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30bf\u30b0<\/td><td>\u5168\u4f53\u7684\u306b\u3082\u305f\u3064\u304f<\/td><td>\u8aad\u307f\u8fbc\u307f\u3092\u9045\u5ef6\u30fb\u524a\u6e1b<\/td><\/tr>\n<tr><td>\u5de8\u5927\u306aDOM<\/td><td>\u30b9\u30af\u30ed\u30fc\u30eb\u304c\u91cd\u3044<\/td><td>\u8981\u7d20\u6570\u3092\u6e1b\u3089\u3059\u30fb\u4eee\u60f3\u5316<\/td><\/tr>\n<tr><td>\u904e\u5270\u306a\u30a4\u30d9\u30f3\u30c8<\/td><td>\u5165\u529b\u304c\u9045\u308c\u308b<\/td><td>debounce\u30fbthrottle\u3092\u4f7f\u3046<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-javascript\" data-lang=\"JavaScript\"><code>\/\/ \u5165\u529b\u306e\u305f\u3073\u306b\u51e6\u7406\u305b\u305a\u3001\u6b62\u307e\u3063\u3066\u304b\u3089\u5b9f\u884c\u3059\u308b\nfunction debounce(fn, wait = 300) {\n  let timer;\n  return (...args) =&gt; {\n    clearTimeout(timer);\n    timer = setTimeout(() =&gt; fn(...args), wait);\n  };\n}\n\nsearchInput.addEventListener('input', debounce((e) =&gt; {\n  search(e.target.value);\n}, 300));<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u5e83\u544a\u3084\u30c1\u30e3\u30c3\u30c8\u30c4\u30fc\u30eb\u306a\u3069\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001<span class=\"swl-marker mark_yellow\">\u81ea\u5206\u306e\u30b3\u30fc\u30c9\u3088\u308a\u91cd\u3044\u3053\u3068\u304c\u591a\u3044<\/span>\u3067\u3059\u3002\u307e\u305a\u8aad\u307f\u8fbc\u3093\u3067\u3044\u308b\u30bf\u30b0\u3092\u68da\u5378\u3057\u3057\u3001\u672c\u5f53\u306b\u5fc5\u8981\u304b\u5224\u65ad\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">CLS\uff08\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u305a\u308c\uff09\u3092\u6539\u5584\u3059\u308b<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-05.jpg\" alt=\"CLS\uff08\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u305a\u308c\uff09\u3092\u6539\u5584\u3059\u308b\" class=\"wp-image-20438\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-05.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-05-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-05-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u8aad\u3093\u3067\u3044\u308b\u9014\u4e2d\u3067\u6587\u5b57\u3084\u753b\u50cf\u304c\u52d5\u304f\u73fe\u8c61\u3067\u3059\u30023\u6307\u6a19\u306e\u4e2d\u3067\u6700\u3082\u76f4\u3057\u3084\u3059\u304f\u3001\u52b9\u679c\u3082\u3059\u3050\u51fa\u307e\u3059\u3002<\/p>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- \u60aa\u3044\u4f8b\uff1a\u30b5\u30a4\u30ba\u672a\u6307\u5b9a\u3002\u8aad\u307f\u8fbc\u307f\u5f8c\u306b\u9ad8\u3055\u304c\u78ba\u5b9a\u3057\u3066\u4e0b\u304c\u305a\u308c\u308b --&gt;\n&lt;img src=\"\/img\/photo.jpg\" alt=\"\"&gt;\n\n&lt;!-- \u826f\u3044\u4f8b\uff1a\u5e45\u3068\u9ad8\u3055\u3092\u5c5e\u6027\u3067\u6307\u5b9a\u3059\u308b --&gt;\n&lt;img src=\"\/img\/photo.jpg\" width=\"800\" height=\"450\" alt=\"\"&gt;<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* CSS\u5074\u3067\u6bd4\u7387\u3092\u56fa\u5b9a\u3057\u3066\u304a\u304f\u65b9\u6cd5 *\/\n.thumb {\n  width: 100%;\n  aspect-ratio: 16 \/ 9;\n  object-fit: cover;\n}\n\n\/* \u5f8c\u304b\u3089\u5dee\u3057\u8fbc\u3080\u9818\u57df\u306f\u3001\u3042\u3089\u304b\u3058\u3081\u9ad8\u3055\u3092\u78ba\u4fdd\u3059\u308b *\/\n.ad-slot {\n  min-height: 280px;\n}\n\n\/* Web\u30d5\u30a9\u30f3\u30c8\u306e\u5207\u308a\u66ff\u3048\u3067\u305a\u308c\u308b\u5834\u5408\u306f\u4ee3\u66ff\u30d5\u30a9\u30f3\u30c8\u3092\u8abf\u6574\u3059\u308b *\/\n@font-face {\n  font-family: 'MyFont';\n  src: url('\/fonts\/myfont.woff2') format('woff2');\n  font-display: swap;\n  size-adjust: 100%;      \/* \u4ee3\u66ff\u30d5\u30a9\u30f3\u30c8\u3068\u306e\u6587\u5b57\u5e45\u306e\u5dee\u3092\u88dc\u6b63 *\/\n}<\/code><\/pre><\/div>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u305a\u308c\u306e\u539f\u56e0<\/th><th>\u5bfe\u51e6<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u672a\u6307\u5b9a<\/td><td><code>width<\/code>\u30fb<code>height<\/code>\u5c5e\u6027\u3092\u66f8\u304f<\/td><\/tr>\n<tr><td>\u5e83\u544a\u30fb\u57cb\u3081\u8fbc\u307f\u306e\u5f8c\u8aad\u307f<\/td><td><code>min-height<\/code>\u3067\u5834\u6240\u3092\u78ba\u4fdd<\/td><\/tr>\n<tr><td>Web\u30d5\u30a9\u30f3\u30c8\u306e\u5207\u308a\u66ff\u3048<\/td><td><code>font-display<\/code>\u3068<code>size-adjust<\/code><\/td><\/tr>\n<tr><td>\u5f8c\u304b\u3089\u633f\u5165\u3055\u308c\u308b\u30d0\u30ca\u30fc<\/td><td>\u65e2\u5b58\u8981\u7d20\u306e\u4e0a\u306b\u91cd\u306d\u308b\uff08\u62bc\u3057\u4e0b\u3052\u306a\u3044\uff09<\/td><\/tr>\n<tr><td>\u52d5\u7684\u306a\u4e00\u89a7\u306e\u5dee\u3057\u8fbc\u307f<\/td><td>\u8aad\u307f\u8fbc\u307f\u4e2d\u306e\u9ad8\u3055\u3092\u56fa\u5b9a<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">CLS\u306f<span class=\"swl-marker mark_yellow\">\u6570\u884c\u306e\u4fee\u6b63\u30670.25\u304b\u30890.05\u307e\u3067\u4e0b\u304c\u308b<\/span>\u3053\u3068\u3082\u73cd\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u7740\u624b\u30b3\u30b9\u30c8\u304c\u6700\u3082\u4f4e\u3044\u305f\u3081\u3001\u6700\u521d\u306b\u53d6\u308a\u304b\u304b\u308b\u6307\u6a19\u3068\u3057\u3066\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u753b\u50cf\u306e\u6700\u9069\u5316\u304c\u6700\u3082\u52b9\u304f\u7406\u7531<\/h2>\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306e\u30b5\u30a4\u30c8\u3067\u3001\u8ee2\u9001\u91cf\u306e6\u301c8\u5272\u3092\u753b\u50cf\u304c\u5360\u3081\u307e\u3059\u3002\u3053\u3053\u3092\u524a\u308b\u306e\u304cLCP\u6539\u5584\u306e\u8fd1\u9053\u3067\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5f62\u5f0f<\/strong>\uff1aWebP\u306b\u5909\u63db\u3059\u308b\u3002JPEG\u3088\u308a2\u301c3\u5272\u8efd\u304f\u306a\u308b<\/li>\n<li><strong>\u5bf8\u6cd5<\/strong>\uff1a\u8868\u793a\u30b5\u30a4\u30ba\u306e2\u500d\u4ee5\u5185\u306b\u53ce\u3081\u308b\u30024000px\u5e45\u306e\u5199\u771f\u3092\u305d\u306e\u307e\u307e\u8f09\u305b\u306a\u3044<\/li>\n<li><strong>\u5bb9\u91cf<\/strong>\uff1a\u672c\u6587\u7528\u306f200KB\u4ee5\u4e0b\u3001\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u306f300KB\u4ee5\u4e0b\u3092\u76ee\u5b89\u306b<\/li>\n<li><strong>\u9045\u5ef6<\/strong>\uff1a\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u4ee5\u5916\u306f<code>loading=&quot;lazy&quot;<\/code><\/li>\n<li><strong>\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6<\/strong>\uff1a<code>srcset<\/code>\u3067\u753b\u9762\u5e45\u306b\u5fdc\u3058\u305f\u753b\u50cf\u3092\u914d\u308b<\/li>\n<\/ul>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;img src=\"\/img\/photo-800.webp\"\n     srcset=\"\/img\/photo-400.webp 400w,\n             \/img\/photo-800.webp 800w,\n             \/img\/photo-1200.webp 1200w\"\n     sizes=\"(max-width: 768px) 100vw, 760px\"\n     width=\"800\" height=\"450\"\n     alt=\"\u8aac\u660e\" loading=\"lazy\"&gt;<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30de\u30db\u306b1200px\u5e45\u306e\u753b\u50cf\u3092\u914d\u308b\u306e\u306f\u7121\u99c4\u3067\u3059\u3002<code>srcset<\/code>\u3068<code>sizes<\/code>\u3092\u66f8\u3051\u3070\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u6700\u9069\u306a1\u679a\u3092\u9078\u3073\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">WordPress\u3067\u306e\u5177\u4f53\u7684\u306a\u8a2d\u5b9a<\/h2>\n\n<p class=\"wp-block-paragraph\">WordPress\u30b5\u30a4\u30c8\u3067\u306f\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u30c6\u30fc\u30de\u5074\u306e\u8a2d\u5b9a\u3067\u5927\u534a\u3092\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u5bfe\u7b56<\/th><th>\u624b\u6bb5<\/th><th>\u52b9\u679c\u306e\u5927\u304d\u3055<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u7cfb\u30d7\u30e9\u30b0\u30a4\u30f3<\/td><td>\u5927\uff08TTFB\u77ed\u7e2e\uff09<\/td><\/tr>\n<tr><td>WebP\u5909\u63db<\/td><td>\u753b\u50cf\u6700\u9069\u5316\u30d7\u30e9\u30b0\u30a4\u30f3<\/td><td>\u5927\uff08\u8ee2\u9001\u91cf\u524a\u6e1b\uff09<\/td><\/tr>\n<tr><td>\u4e0d\u8981\u30d7\u30e9\u30b0\u30a4\u30f3\u524a\u9664<\/td><td>\u624b\u52d5\u3067\u68da\u5378\u3057<\/td><td>\u4e2d\u301c\u5927<\/td><\/tr>\n<tr><td>CSS\u30fbJS\u306e\u6700\u9069\u5316<\/td><td>\u6700\u9069\u5316\u30d7\u30e9\u30b0\u30a4\u30f3<\/td><td>\u4e2d\uff08\u8981\u691c\u8a3c\uff09<\/td><\/tr>\n<tr><td>\u7d75\u6587\u5b57\u30b9\u30af\u30ea\u30d7\u30c8\u524a\u9664<\/td><td>functions.php<\/td><td>\u5c0f<\/td><\/tr>\n<tr><td>\u30ea\u30d3\u30b8\u30e7\u30f3\u524a\u6e1b<\/td><td>wp-config.php<\/td><td>\u5c0f\uff08DB\u8efd\u91cf\u5316\uff09<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-php\" data-lang=\"functions.php\"><code>&lt;?php\n\/\/ \u4f7f\u3063\u3066\u3044\u306a\u3044\u7d75\u6587\u5b57\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u6b62\u3081\u308b\nremove_action( 'wp_head', 'print_emoji_detection_script', 7 );\nremove_action( 'wp_print_styles', 'print_emoji_styles' );\n\n\/\/ \u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u3092\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u306e\u5bfe\u8c61\u304b\u3089\u5916\u3059\nadd_filter( 'wp_get_attachment_image_attributes', function ( $attr, $attachment, $size ) {\n\tif ( is_singular() &amp;&amp; ! did_action( 'wp_body_open' ) ) {\n\t\t$attr['loading'] = 'eager';\n\t\t$attr['fetchpriority'] = 'high';\n\t}\n\treturn $attr;\n}, 10, 3 );<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-php\" data-lang=\"wp-config.php\"><code>&lt;?php\n\/** \u30ea\u30d3\u30b8\u30e7\u30f3\u30923\u4ef6\u307e\u3067\u306b\u5236\u9650\u3059\u308b *\/\ndefine( 'WP_POST_REVISIONS', 3 );\n\n\/** \u81ea\u52d5\u4fdd\u5b58\u306e\u9593\u9694\u3092\u5ef6\u3070\u3059 *\/\ndefine( 'AUTOSAVE_INTERVAL', 300 );<\/code><\/pre><\/div>\n\n<h2 class=\"wp-block-heading\">\u3084\u308a\u3059\u304e\u308b\u3068\u9006\u52b9\u679c\u306b\u306a\u308b\u65bd\u7b56<\/h2>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30b3\u30a2\u3092\u4e0a\u3052\u3088\u3046\u3068\u3057\u3066\u3001\u304b\u3048\u3063\u3066\u8868\u793a\u304c\u58ca\u308c\u308b\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e4\u3064\u306f\u614e\u91cd\u306b\u6271\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u65bd\u7b56<\/th><th>\u30ea\u30b9\u30af<\/th><th>\u5224\u65ad<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>CSS\u30fbJS\u306e\u7d50\u5408\u3068\u5727\u7e2e<\/td><td>\u30ec\u30a4\u30a2\u30a6\u30c8\u5d29\u308c\u30fb\u6a5f\u80fd\u505c\u6b62<\/td><td>1\u3064\u305a\u3064\u691c\u8a3c<\/td><\/tr>\n<tr><td>\u3059\u3079\u3066\u306e\u753b\u50cf\u3092\u9045\u5ef6\u8aad\u8fbc<\/td><td>LCP\u304c\u60aa\u5316\u3059\u308b<\/td><td>\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306f\u9664\u5916<\/td><\/tr>\n<tr><td>JS\u306e\u9045\u5ef6\u5b9f\u884c\uff08defer\u4e00\u62ec\uff09<\/td><td>\u52d5\u4f5c\u9806\u304c\u58ca\u308c\u308b<\/td><td>\u4f9d\u5b58\u95a2\u4fc2\u3092\u78ba\u8a8d<\/td><\/tr>\n<tr><td>\u6700\u9069\u5316\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u591a\u91cd\u5c0e\u5165<\/td><td>\u8a2d\u5b9a\u304c\u885d\u7a81\u3059\u308b<\/td><td>1\u3064\u306b\u7d5e\u308b<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u6700\u9069\u5316\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u4f75\u7528\u306f\u4e8b\u6545\u306e\u3082\u3068\u3067\u3059\u3002<span class=\"swl-marker mark_yellow\">\u540c\u3058\u51e6\u7406\u30922\u3064\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u304c\u884c\u3046<\/span>\u3068\u3001\u5727\u7e2e\u6e08\u307f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u3055\u3089\u306b\u5727\u7e2e\u3057\u3066\u58ca\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30b3\u30a2\u306f\u76ee\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002100\u70b9\u3067\u3082\u8868\u793a\u304c\u5d29\u308c\u3066\u3044\u308c\u3070\u5931\u6557\u3067\u3059\u3002\u6570\u5024\u3092\u4e0a\u3052\u308b\u524d\u306b\u3001\u5b9f\u6a5f\u3067\u64cd\u4f5c\u3057\u3066\u554f\u984c\u304c\u306a\u3044\u304b\u3092\u5fc5\u305a\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u6539\u5584\u5f8c\u306e\u78ba\u8a8d\u3068\u7d99\u7d9a\u7684\u306a\u76e3\u8996<\/h2>\n\n<p class=\"wp-block-paragraph\">\u76f4\u3057\u305f\u3089\u7d42\u308f\u308a\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8a18\u4e8b\u306e\u8ffd\u52a0\u3084\u30d7\u30e9\u30b0\u30a4\u30f3\u66f4\u65b0\u3067\u3001\u7c21\u5358\u306b\u5143\u3078\u623b\u308a\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u67081\u56de<\/strong>\uff1aSearch Console\u306e\u300c\u30a6\u30a7\u30d6\u306b\u95a2\u3059\u308b\u4e3b\u306a\u6307\u6a19\u300d\u3067\u5168\u4f53\u3092\u78ba\u8a8d<\/li>\n<li><strong>\u516c\u958b\u524d<\/strong>\uff1a\u65b0\u3057\u3044\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f5c\u3063\u305f\u3089Lighthouse\u3067\u6e2c\u308b<\/li>\n<li><strong>\u30d7\u30e9\u30b0\u30a4\u30f3\u66f4\u65b0\u5f8c<\/strong>\uff1a\u4e3b\u8981\u30da\u30fc\u30b8\u306e\u8868\u793a\u3092\u5b9f\u6a5f\u3067\u78ba\u8a8d<\/li>\n<li><strong>\u56db\u534a\u671f\u3054\u3068<\/strong>\uff1a\u753b\u50cf\u306e\u7dcf\u5bb9\u91cf\u3068\u3001\u6709\u52b9\u30d7\u30e9\u30b0\u30a4\u30f3\u6570\u3092\u68da\u5378\u3057<\/li>\n<\/ul>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code># CLI\u3067\u5b9a\u70b9\u89b3\u6e2c\u3059\u308b\uff08Lighthouse CI\uff09\nnpx lighthouse https:\/\/example.com\/ \\\n  --preset=desktop --output=json --output-path=.\/report.json --quiet\n\n# \u4e3b\u8981\u6307\u6a19\u3060\u3051\u53d6\u308a\u51fa\u3059\ncat report.json | python3 -c \"\nimport json,sys\nd=json.load(sys.stdin)['audits']\nfor k in ['largest-contentful-paint','cumulative-layout-shift','total-blocking-time']:\n    print(k, d[k]['displayValue'])\"<\/code><\/pre><\/div>\n\n<h2 class=\"wp-block-heading\">\u512a\u5148\u9806\u4f4d\u306e\u3064\u3051\u65b9<\/h2>\n\n<figure class=\"wp-block-image size-large\" data-dia=\"20125-4\"><img decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-06.jpg\" alt=\"\u512a\u5148\u9806\u4f4d\u306e\u3064\u3051\u65b9\" class=\"wp-image-20439\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-06.jpg 1672w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-06-768x432.jpg 768w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/09\/section-06-1536x864.jpg 1536w\" sizes=\"(max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">\u9650\u3089\u308c\u305f\u6642\u9593\u3067\u6700\u5927\u306e\u52b9\u679c\u3092\u51fa\u3059\u305f\u3081\u306e\u9806\u5e8f\u3067\u3059\u3002\u4e0a\u304b\u3089\u9806\u306b\u53d6\u308a\u304b\u304b\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u9806\u4f4d<\/th><th>\u5bfe\u7b56<\/th><th>\u624b\u9593<\/th><th>\u52b9\u679c<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>1<\/td><td>\u753b\u50cf\u306e\u30b5\u30a4\u30ba\u6307\u5b9a\uff08CLS\uff09<\/td><td>\u5c0f<\/td><td>\u5927<\/td><\/tr>\n<tr><td>2<\/td><td>\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u753b\u50cf\u306e\u9045\u5ef6\u89e3\u9664<\/td><td>\u5c0f<\/td><td>\u5927<\/td><\/tr>\n<tr><td>3<\/td><td>\u753b\u50cf\u306eWebP\u5316\u30fb\u30ea\u30b5\u30a4\u30ba<\/td><td>\u4e2d<\/td><td>\u5927<\/td><\/tr>\n<tr><td>4<\/td><td>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5c0e\u5165<\/td><td>\u5c0f<\/td><td>\u5927<\/td><\/tr>\n<tr><td>5<\/td><td>\u4e0d\u8981\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u524a\u9664<\/td><td>\u4e2d<\/td><td>\u4e2d<\/td><\/tr>\n<tr><td>6<\/td><td>\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30bf\u30b0\u306e\u6574\u7406<\/td><td>\u4e2d<\/td><td>\u4e2d<\/td><\/tr>\n<tr><td>7<\/td><td>CSS\u30fbJS\u306e\u6700\u9069\u5316<\/td><td>\u5927<\/td><td>\u4e2d\uff08\u8981\u691c\u8a3c\uff09<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">1\u30682\u306f<span class=\"swl-marker mark_yellow\">\u6570\u884c\u306e\u4fee\u6b63\u3067\u7d42\u308f\u308b\u306e\u306b\u52b9\u679c\u304c\u5927\u304d\u3044<\/span>\u305f\u3081\u3001\u5fc5\u305a\u6700\u521d\u306b\u3084\u3063\u3066\u304f\u3060\u3055\u3044\u30027\u756a\u306f\u624b\u9593\u304c\u5927\u304d\u304f\u4e8b\u6545\u7387\u3082\u9ad8\u3044\u306e\u3067\u3001\u4ed6\u3092\u7d42\u3048\u3066\u304b\u3089\u7740\u624b\u3057\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30da\u30fc\u30b8\u7a2e\u5225\u3054\u3068\u306e\u91cd\u70b9\u30dd\u30a4\u30f3\u30c8<\/h2>\n\n<p class=\"wp-block-paragraph\">\u3069\u306e\u6307\u6a19\u304c\u554f\u984c\u306b\u306a\u308a\u3084\u3059\u3044\u304b\u306f\u3001\u30da\u30fc\u30b8\u306e\u6027\u8cea\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u307e\u3059\u3002\u5168\u30da\u30fc\u30b8\u3092\u540c\u3058\u3088\u3046\u306b\u76f4\u3059\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u30da\u30fc\u30b8\u7a2e\u5225<\/th><th>\u554f\u984c\u306b\u306a\u308a\u3084\u3059\u3044\u6307\u6a19<\/th><th>\u91cd\u70b9\u5bfe\u7b56<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30c8\u30c3\u30d7\u30da\u30fc\u30b8<\/td><td>LCP\u30fbCLS<\/td><td>\u30e1\u30a4\u30f3\u30d3\u30b8\u30e5\u30a2\u30eb\u306e\u6700\u9069\u5316<\/td><\/tr>\n<tr><td>\u8a18\u4e8b\u30da\u30fc\u30b8<\/td><td>CLS\u30fbLCP<\/td><td>\u672c\u6587\u4e2d\u306e\u753b\u50cf\u3068\u5e83\u544a\u67a0<\/td><\/tr>\n<tr><td>\u4e00\u89a7\u30fb\u30a2\u30fc\u30ab\u30a4\u30d6<\/td><td>LCP<\/td><td>\u30b5\u30e0\u30cd\u30a4\u30eb\u306e\u679a\u6570\u3068\u9045\u5ef6\u8aad\u8fbc<\/td><\/tr>\n<tr><td>\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0<\/td><td>INP<\/td><td>\u5165\u529b\u6642\u306eJavaScript\u51e6\u7406<\/td><\/tr>\n<tr><td>\u691c\u7d22\u7d50\u679c\u30da\u30fc\u30b8<\/td><td>INP<\/td><td>\u7d5e\u308a\u8fbc\u307f\u306e\u518d\u63cf\u753b<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u6539\u5584\u306e\u9806\u756a\u306f<span class=\"swl-marker mark_yellow\">\u6d41\u5165\u306e\u591a\u3044\u30da\u30fc\u30b8\u304b\u3089<\/span>\u3067\u3059\u3002Search Console\u306e\u691c\u7d22\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3067\u4e0a\u4f4d\u30da\u30fc\u30b8\u3092\u78ba\u8a8d\u3057\u3001\u305d\u3053\u304b\u3089\u7740\u624b\u3059\u308c\u3070\u540c\u3058\u5de5\u6570\u3067\u52b9\u679c\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u8a18\u4e8b\u30da\u30fc\u30b8\u3067\u7279\u306b\u52b9\u304f3\u70b9<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;!-- 1. \u672c\u6587\u4e2d\u306e\u753b\u50cf\u306f\u3059\u3079\u3066\u5e45\u30fb\u9ad8\u3055\u3092\u6301\u305f\u305b\u308b --&gt;\n&lt;img src=\"\/img\/section.webp\" width=\"1120\" height=\"630\" alt=\"\u8aac\u660e\" loading=\"lazy\"&gt;\n\n&lt;!-- 2. \u5e83\u544a\u30fb\u57cb\u3081\u8fbc\u307f\u67a0\u306f\u5148\u306b\u9ad8\u3055\u3092\u78ba\u4fdd\u3059\u308b --&gt;\n&lt;div class=\"embed-slot\" style=\"min-height:280px\"&gt;&lt;\/div&gt;\n\n&lt;!-- 3. YouTube\u306f\u30b5\u30e0\u30cd\u30a4\u30eb\u7f6e\u63db\u3067\u8aad\u307f\u8fbc\u307f\u3092\u9045\u3089\u305b\u308b --&gt;\n&lt;div class=\"yt-facade\" data-id=\"VIDEO_ID\"&gt;\n  &lt;img src=\"https:\/\/i.ytimg.com\/vi\/VIDEO_ID\/hqdefault.jpg\"\n       width=\"480\" height=\"360\" alt=\"\u52d5\u753b\u306e\u30b5\u30e0\u30cd\u30a4\u30eb\" loading=\"lazy\"&gt;\n&lt;\/div&gt;<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">YouTube\u306e\u57cb\u3081\u8fbc\u307f\u306f1\u3064\u3067\u6570\u767eKB\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u30af\u30ea\u30c3\u30af\u3055\u308c\u308b\u307e\u3067\u30b5\u30e0\u30cd\u30a4\u30eb\u753b\u50cf\u3067\u4ee3\u66ff\u3059\u308b\u3068\u3001LCP\u3068INP\u306e\u4e21\u65b9\u304c\u6539\u5584\u3057\u307e\u3059\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u5b9f\u969b\u306b\u6e2c\u3063\u3066\u76f4\u3057\u305f\u4f8b<\/h2>\n\n<p class=\"wp-block-paragraph\">\u5178\u578b\u7684\u306aWordPress\u30e1\u30c7\u30a3\u30a2\u3067\u3001\u3069\u306e\u5bfe\u7b56\u304c\u3069\u308c\u3060\u3051\u52b9\u3044\u305f\u304b\u306e\u76ee\u5b89\u3067\u3059\u3002\u6570\u5024\u306f\u74b0\u5883\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u307e\u3059\u304c\u3001\u9806\u5e8f\u306e\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u5bfe\u7b56<\/th><th>LCP\u306e\u5909\u5316<\/th><th>CLS\u306e\u5909\u5316<\/th><th>\u4f5c\u696d\u6642\u9593<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u753b\u50cf\u306b\u5e45\u30fb\u9ad8\u3055\u6307\u5b9a<\/td><td>\u5909\u5316\u306a\u3057<\/td><td>0.28 \u2192 0.06<\/td><td>30\u5206<\/td><\/tr>\n<tr><td>FV\u753b\u50cf\u306eeager\u5316<\/td><td>4.1s \u2192 3.2s<\/td><td>\u5909\u5316\u306a\u3057<\/td><td>10\u5206<\/td><\/tr>\n<tr><td>\u753b\u50cf\u306eWebP\u5316<\/td><td>3.2s \u2192 2.6s<\/td><td>\u5909\u5316\u306a\u3057<\/td><td>1\u6642\u9593<\/td><\/tr>\n<tr><td>\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u5c0e\u5165<\/td><td>2.6s \u2192 1.9s<\/td><td>\u5909\u5316\u306a\u3057<\/td><td>30\u5206<\/td><\/tr>\n<tr><td>\u4e0d\u8981\u30d7\u30e9\u30b0\u30a4\u30f35\u500b\u524a\u9664<\/td><td>1.9s \u2192 1.7s<\/td><td>\u5909\u5316\u306a\u3057<\/td><td>2\u6642\u9593<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u6ce8\u76ee\u3059\u3079\u304d\u306f<span class=\"swl-marker mark_yellow\">\u6700\u521d\u306e2\u3064\u304c40\u5206\u3067\u7d42\u308f\u3063\u3066\u3044\u308b<\/span>\u70b9\u3067\u3059\u3002CLS\u306f\u307b\u307c\u89e3\u6d88\u3057\u3001LCP\u30821\u79d2\u8fd1\u304f\u7e2e\u3093\u3067\u3044\u307e\u3059\u3002\u7740\u624b\u306e\u30cf\u30fc\u30c9\u30eb\u304c\u4f4e\u3044\u9806\u306b\u4e26\u3079\u308b\u3068\u3001\u3053\u3046\u3057\u305f\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u6e2c\u5b9a\u306e\u8a18\u9332\u3092\u6b8b\u3059<\/h3>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"\u8a18\u9332\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\"><code>\u65e5\u4ed8\uff1a2026-09-01\n\u5bfe\u8c61URL\uff1ahttps:\/\/example.com\/article\/\n\u6e2c\u5b9a\u6761\u4ef6\uff1aLighthouse \u30e2\u30d0\u30a4\u30eb \/ \u30b7\u30fc\u30af\u30ec\u30c3\u30c8\u30a6\u30a3\u30f3\u30c9\u30a6\n\n\u5bfe\u7b56\u524d\uff1a LCP 4.1s \/ INP 240ms \/ CLS 0.28\n\u5b9f\u65bd\u5185\u5bb9\uff1a\u672c\u6587\u753b\u50cf\u306b width\u30fbheight \u3092\u8ffd\u52a0\uff0812\u679a\uff09\n\u5bfe\u7b56\u5f8c\uff1a LCP 4.0s \/ INP 240ms \/ CLS 0.06\n\n\u6240\u611f\uff1aCLS\u306f\u60f3\u5b9a\u3069\u304a\u308a\u6539\u5584\u3002LCP\u306f\u753b\u50cf\u5f62\u5f0f\u304c\u539f\u56e0\u306e\u305f\u3081\u6b21\u56de\u5bfe\u5fdc\u3002<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">1\u3064\u76f4\u3059\u3054\u3068\u306b\u6e2c\u3063\u3066\u8a18\u9332\u3059\u308b\u3068\u3001\u3069\u306e\u65bd\u7b56\u304c\u52b9\u3044\u305f\u304b\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u3068\u3081\u3066\u76f4\u3057\u3066\u304b\u3089\u6e2c\u308b\u3068\u3001\u52b9\u679c\u306e\u5207\u308a\u5206\u3051\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n<h2 class=\"wp-block-heading\">\u30c1\u30fc\u30e0\u30fb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3078\u306e\u8aac\u660e<\/h2>\n\n<p class=\"wp-block-paragraph\">\u6539\u5584\u306e\u5fc5\u8981\u6027\u3092\u4f1d\u3048\u308b\u3068\u304d\u3001\u6280\u8853\u7528\u8a9e\u306e\u307e\u307e\u3067\u306f\u5224\u65ad\u3057\u3066\u3082\u3089\u3048\u307e\u305b\u3093\u3002\u8a00\u3044\u63db\u3048\u306e\u4f8b\u3092\u6319\u3052\u307e\u3059\u3002<\/p>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u6307\u6a19<\/th><th>\u6280\u8853\u7684\u306a\u8aac\u660e<\/th><th>\u4f1d\u308f\u308b\u8a00\u3044\u63db\u3048<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>LCP<\/td><td>\u6700\u5927\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u63cf\u753b\u6642\u9593<\/td><td>\u30da\u30fc\u30b8\u304c\u300c\u898b\u3048\u305f\u300d\u3068\u611f\u3058\u308b\u307e\u3067\u306e\u6642\u9593<\/td><\/tr>\n<tr><td>INP<\/td><td>\u6b21\u306e\u63cf\u753b\u307e\u3067\u306e\u76f8\u4e92\u4f5c\u7528<\/td><td>\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u304b\u3089\u53cd\u5fdc\u3059\u308b\u307e\u3067\u306e\u5f85\u3061<\/td><\/tr>\n<tr><td>CLS<\/td><td>\u7d2f\u7a4d\u30ec\u30a4\u30a2\u30a6\u30c8\u30b7\u30d5\u30c8<\/td><td>\u8aad\u3093\u3067\u3044\u308b\u9014\u4e2d\u3067\u6587\u5b57\u3084\u753b\u50cf\u304c\u305a\u308c\u308b\u73fe\u8c61<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u7279\u306bCLS\u306f<span class=\"swl-marker mark_yellow\">\u5b9f\u969b\u306b\u4f53\u9a13\u3057\u3066\u3082\u3089\u3046\u306e\u304c\u65e9\u3044<\/span>\u3067\u3059\u3002\u30b9\u30de\u30db\u3067\u81ea\u793e\u30b5\u30a4\u30c8\u3092\u958b\u304d\u3001\u8aad\u3082\u3046\u3068\u3057\u305f\u77ac\u9593\u306b\u5e83\u544a\u304c\u5165\u3063\u3066\u4f4d\u7f6e\u304c\u305a\u308c\u308b\u69d8\u5b50\u3092\u898b\u305b\u308c\u3070\u3001\u8aac\u660e\u306f\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30b3\u30a2\u306e\u6570\u5024\u3067\u306f\u306a\u304f\u3001\u96e2\u8131\u7387\u3084\u6ede\u5728\u6642\u9593\u3068\u7d50\u3073\u3064\u3051\u3066\u8aac\u660e\u3059\u308b<\/li>\n<li>\u300c\u691c\u7d22\u9806\u4f4d\u304c\u4e0a\u304c\u308b\u300d\u3068\u65ad\u8a00\u3057\u306a\u3044\u3002\u4f53\u9a13\u306e\u6539\u5584\u304c\u4e3b\u76ee\u7684<\/li>\n<li>\u4f5c\u696d\u6642\u9593\u3068\u52b9\u679c\u306e\u4e00\u89a7\uff08\u524d\u8ff0\u306e\u8868\uff09\u3092\u793a\u3057\u3001\u512a\u5148\u9806\u4f4d\u3092\u5408\u610f\u3059\u308b<\/li>\n<li>\u6539\u5584\u5f8c\u306f\u524d\u5f8c\u306e\u6570\u5024\u3092\u4e26\u3079\u3066\u5171\u6709\u3059\u308b<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">\u30b5\u30fc\u30d0\u30fc\u5fdc\u7b54\uff08TTFB\uff09\u3092\u7e2e\u3081\u308b<\/h2>\n\n<p class=\"wp-block-paragraph\">LCP\u306e\u5185\u8a33\u3092\u898b\u308b\u3068\u3001\u5b9f\u306f\u753b\u50cf\u3067\u306f\u306a\u304f\u30b5\u30fc\u30d0\u30fc\u306e\u5fdc\u7b54\u5f85\u3061\u304c\u5927\u534a\u3092\u5360\u3081\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3092\u7e2e\u3081\u308b\u3068\u5168\u30da\u30fc\u30b8\u304c\u4e00\u5f8b\u306b\u901f\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">TTFB\u306e\u76ee\u5b89\u3068\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>TTFB<\/th><th>\u8a55\u4fa1<\/th><th>\u3068\u308b\u3079\u304d\u5bfe\u5fdc<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>0.2\u79d2\u4ee5\u4e0b<\/td><td>\u826f\u597d<\/td><td>\u5bfe\u5fdc\u4e0d\u8981<\/td><\/tr>\n<tr><td>0.2\u301c0.8\u79d2<\/td><td>\u8a31\u5bb9\u7bc4\u56f2<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u6539\u5584\u4f59\u5730<\/td><\/tr>\n<tr><td>0.8\u301c1.8\u79d2<\/td><td>\u8981\u6539\u5584<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u5fc5\u9808\u30fb\u69cb\u6210\u898b\u76f4\u3057<\/td><\/tr>\n<tr><td>1.8\u79d2\u8d85<\/td><td>\u6df1\u523b<\/td><td>\u30b5\u30fc\u30d0\u30fc\u79fb\u8ee2\u3092\u691c\u8a0e<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code># TTFB\u3060\u3051\u3092\u6e2c\u308b\ncurl -o \/dev\/null -s -w \"\u63a5\u7d9a: %{time_connect}s  TTFB: %{time_starttransfer}s  \u5408\u8a08: %{time_total}s\\n\" \\\n  https:\/\/example.com\/\n\n# \u8907\u6570\u56de\u6e2c\u3063\u3066\u5e73\u5747\u3092\u898b\u308b\uff08\u521d\u56de\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u672a\u751f\u6210\u3067\u9045\u3044\uff09\nfor i in 1 2 3; do\n  curl -o \/dev\/null -s -w \"%{time_starttransfer}\\n\" https:\/\/example.com\/\ndone<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">1\u56de\u3060\u3051\u306e\u6e2c\u5b9a\u3067\u306f\u5224\u65ad\u3067\u304d\u307e\u305b\u3093\u3002<span class=\"swl-marker mark_yellow\">3\u56de\u4ee5\u4e0a\u6e2c\u3063\u30662\u56de\u76ee\u4ee5\u964d\u306e\u5024<\/span>\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002\u521d\u56de\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u52b9\u3044\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u5b9f\u614b\u3088\u308a\u9045\u304f\u51fa\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">WordPress\u3067TTFB\u304c\u4f38\u3073\u308b\u4e3b\u306a\u539f\u56e0<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u672a\u5c0e\u5165<\/strong>\uff1a\u6bce\u56dePHP\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u7d44\u307f\u7acb\u3066\u3066\u3044\u308b<\/li>\n<li><strong>\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u904e\u591a<\/strong>\uff1a\u6709\u52b9\u5316\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u521d\u671f\u5316\u51e6\u7406\u304c\u8d70\u308b<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u80a5\u5927\u5316<\/strong>\uff1a\u30ea\u30d3\u30b8\u30e7\u30f3\u3084\u671f\u9650\u5207\u308c\u30c7\u30fc\u30bf\u306e\u84c4\u7a4d<\/li>\n<li><strong>\u5916\u90e8API\u306e\u540c\u671f\u547c\u3073\u51fa\u3057<\/strong>\uff1a\u8868\u793a\u6642\u306b\u5916\u90e8\u3078\u554f\u3044\u5408\u308f\u305b\u3066\u3044\u308b<\/li>\n<li><strong>PHP\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u53e4\u3044<\/strong>\uff1a8.x\u7cfb\u306f7.x\u7cfb\u3088\u308a\u660e\u78ba\u306b\u901f\u3044<\/li>\n<\/ul>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-php\" data-lang=\"wp-config.php\"><code>&lt;?php\n\/** \u8868\u793a\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3044\u308b\u30af\u30a8\u30ea\u3092\u8abf\u3079\u308b\uff08\u8abf\u67fb\u6642\u306e\u307f\u6709\u52b9\u5316\uff09 *\/\ndefine( 'SAVEQUERIES', true );\n\n\/** \u8abf\u67fb\u5f8c\u306f\u5fc5\u305a false \u306b\u623b\u3059\u3002\u8ca0\u8377\u304c\u5897\u3048\u308b\u305f\u3081 *\/<\/code><\/pre><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-php\" data-lang=\"functions.php\"><code>&lt;?php\n\/\/ \u9045\u3044\u30af\u30a8\u30ea\u3092\u4e00\u6642\u7684\u306b\u30ed\u30b0\u3078\u51fa\u3059\uff08\u7ba1\u7406\u8005\u306e\u307f\u30fb\u8abf\u67fb\u7528\uff09\nadd_action( 'shutdown', function () {\n\tif ( ! defined( 'SAVEQUERIES' ) || ! SAVEQUERIES || ! current_user_can( 'manage_options' ) ) {\n\t\treturn;\n\t}\n\tglobal $wpdb;\n\tforeach ( $wpdb-&gt;queries as $q ) {\n\t\tif ( $q[1] &gt; 0.05 ) {   \/\/ 50ms\u8d85\u306e\u30af\u30a8\u30ea\u3060\u3051\u8a18\u9332\n\t\t\terror_log( sprintf( '[slow %.3fs] %s', $q[1], substr( $q[0], 0, 200 ) ) );\n\t\t}\n\t}\n} );<\/code><\/pre><\/div>\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8abf\u67fb\u3067\u3001\u7279\u5b9a\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u304c\u6bce\u56de\u91cd\u3044\u30af\u30a8\u30ea\u3092\u6295\u3052\u3066\u3044\u308b\u3053\u3068\u304c\u5224\u660e\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u539f\u56e0\u304c\u7d5e\u308c\u308c\u3070\u3001\u4ee3\u66ff\u30d7\u30e9\u30b0\u30a4\u30f3\u3078\u306e\u5dee\u3057\u66ff\u3048\u3068\u3044\u3046\u5224\u65ad\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5165\u308c\u308b\u3068\u304d\u306e\u6ce8\u610f<\/h3>\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>\u5bfe\u8c61<\/th><th>\u30ad\u30e3\u30c3\u30b7\u30e5<\/th><th>\u7406\u7531<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u8a18\u4e8b\u30fb\u56fa\u5b9a\u30da\u30fc\u30b8<\/td><td>\u3059\u308b<\/td><td>\u5185\u5bb9\u304c\u5909\u308f\u3089\u306a\u3044<\/td><\/tr>\n<tr><td>\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0<\/td><td>\u9664\u5916\u3059\u308b<\/td><td>\u30c8\u30fc\u30af\u30f3\u304c\u56fa\u5b9a\u5316\u3059\u308b<\/td><\/tr>\n<tr><td>\u30ab\u30fc\u30c8\u30fb\u4f1a\u54e1\u30da\u30fc\u30b8<\/td><td>\u9664\u5916\u3059\u308b<\/td><td>\u4ed6\u4eba\u306e\u60c5\u5831\u304c\u51fa\u308b\u6050\u308c<\/td><\/tr>\n<tr><td>\u7ba1\u7406\u753b\u9762<\/td><td>\u9664\u5916\u3059\u308b<\/td><td>\u7de8\u96c6\u5185\u5bb9\u304c\u53cd\u6620\u3055\u308c\u306a\u3044<\/td><\/tr>\n<tr><td>\u691c\u7d22\u7d50\u679c<\/td><td>\u9664\u5916\u63a8\u5968<\/td><td>\u7d44\u307f\u5408\u308f\u305b\u304c\u7121\u9650\u306b\u3042\u308b<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">\u30ad\u30e3\u30c3\u30b7\u30e5\u4e8b\u6545\u3067\u6700\u3082\u91cd\u3044\u306e\u304c<span class=\"swl-marker mark_yellow\">\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u306e\u30da\u30fc\u30b8\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3057\u307e\u3046<\/span>\u30b1\u30fc\u30b9\u3067\u3059\u3002\u4ed6\u4eba\u306e\u4f1a\u54e1\u60c5\u5831\u304c\u5225\u306e\u8a2a\u554f\u8005\u306b\u8868\u793a\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u9664\u5916\u8a2d\u5b9a\u306f\u5fc5\u305a\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n<p class=\"wp-block-paragraph\">Core Web Vitals\u3067\u898b\u308b\u306e\u306fLCP\u30fbINP\u30fbCLS\u306e3\u3064\u3060\u3051\u3067\u3059\u3002\u6539\u5584\u306f\u30e9\u30dc\u30c7\u30fc\u30bf\u3067\u78ba\u8a8d\u3057\u306a\u304c\u3089\u9032\u3081\u3001\u5408\u5426\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf\u3067\u5224\u65ad\u3057\u307e\u3059\u3002\u7740\u624b\u9806\u306f\u3001\u753b\u50cf\u3078\u306e<code>width<\/code>\u30fb<code>height<\/code>\u6307\u5b9a\u3067CLS\u3092\u6f70\u3057\u3001\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u753b\u50cf\u306e\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3092\u89e3\u9664\u3057\u3066LCP\u3092\u7e2e\u3081\u3001\u305d\u306e\u3046\u3048\u3067WebP\u5316\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5165\u308c\u308b\u306e\u304c\u6700\u3082\u52b9\u7387\u7684\u3067\u3059\u3002INP\u306fJavaScript\u306e\u51e6\u7406\u6642\u9593\u304c\u539f\u56e0\u306a\u306e\u3067\u3001\u91cd\u3044\u51e6\u7406\u306e\u5206\u5272\u3068\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30bf\u30b0\u306e\u6574\u7406\u3067\u5bfe\u5fdc\u3057\u307e\u3059\u3002\u30b9\u30b3\u30a2\u305d\u306e\u3082\u306e\u3092\u76ee\u7684\u306b\u305b\u305a\u3001\u5b9f\u6a5f\u3067\u306e\u8868\u793a\u3068\u64cd\u4f5c\u3092\u5fc5\u305a\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<!-- withmedia-faq -->\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n<h3 class=\"wp-block-heading\">PageSpeed Insights\u306e\u30b9\u30b3\u30a2\u306f\u4f55\u70b9\u3042\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u30b9\u30b3\u30a2\u305d\u306e\u3082\u306e\u306f\u9806\u4f4d\u306e\u8a55\u4fa1\u5bfe\u8c61\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u898b\u308b\u3079\u304d\u306f3\u6307\u6a19\u304c\u300c\u826f\u597d\u300d\u306b\u5165\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3067\u3001LCP2.5\u79d2\u4ee5\u4e0b\u30fbINP200ms\u4ee5\u4e0b\u30fbCLS0.1\u4ee5\u4e0b\u304c\u57fa\u6e96\u3067\u3059\u3002\u30b9\u30b3\u30a2\u306f\u76ee\u5b89\u3068\u3057\u3066\u4f7f\u3044\u3001\u5224\u65ad\u306f\u6307\u6a19\u306e\u5b9f\u6e2c\u5024\u3067\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u4fee\u6b63\u3057\u305f\u306e\u306b\u6570\u5024\u304c\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/h3>\n\n<p class=\"wp-block-paragraph\">Search Console\u306b\u8868\u793a\u3055\u308c\u308b\u306e\u306f\u904e\u53bb28\u65e5\u9593\u306e\u5b9f\u8a2a\u554f\u30c7\u30fc\u30bf\u306e\u305f\u3081\u3001\u53cd\u6620\u306b\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u4fee\u6b63\u76f4\u5f8c\u306e\u78ba\u8a8d\u306fLighthouse\u306a\u3069\u306e\u30e9\u30dc\u30c7\u30fc\u30bf\u3067\u884c\u3044\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u30c7\u30fc\u30bf\u306f4\u9031\u9593\u307b\u3069\u5f85\u3063\u3066\u304b\u3089\u5224\u65ad\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">FID\u306f\u3082\u3046\u898b\u306a\u304f\u3066\u3044\u3044\u306e\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">2024\u5e743\u6708\u306bINP\u3078\u7f6e\u304d\u63db\u308f\u308a\u3001\u6307\u6a19\u304b\u3089\u5916\u308c\u307e\u3057\u305f\u3002\u73fe\u5728\u306fINP\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002FID\u306f\u6700\u521d\u306e\u64cd\u4f5c\u3060\u3051\u3092\u6e2c\u308b\u6307\u6a19\u3067\u3057\u305f\u304c\u3001INP\u306f\u30da\u30fc\u30b8\u6ede\u5728\u4e2d\u306e\u3059\u3079\u3066\u306e\u64cd\u4f5c\u3092\u8a55\u4fa1\u3059\u308b\u305f\u3081\u3001\u5b9f\u969b\u306e\u4f53\u611f\u306b\u8fd1\u3044\u6570\u5024\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u753b\u50cf\u3092\u3059\u3079\u3066\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u306b\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u306f\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">\u9006\u52b9\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u3092\u9045\u5ef6\u3055\u305b\u308b\u3068\u3001\u305d\u308c\u304cLCP\u306e\u5bfe\u8c61\u8981\u7d20\u3067\u3042\u308b\u5834\u5408\u306b\u8868\u793a\u304c\u660e\u78ba\u306b\u9045\u304f\u306a\u308a\u307e\u3059\u3002\u753b\u9762\u306b\u6700\u521d\u304b\u3089\u6620\u308b\u753b\u50cf\u306f<code>loading=&quot;eager&quot;<\/code>\u3068<code>fetchpriority=&quot;high&quot;<\/code>\u3092\u6307\u5b9a\u3057\u3001\u4e0b\u90e8\u306e\u753b\u50cf\u3060\u3051\u3092\u9045\u5ef6\u3055\u305b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h3 class=\"wp-block-heading\">\u6700\u9069\u5316\u30d7\u30e9\u30b0\u30a4\u30f3\u306f\u4f55\u3092\u5165\u308c\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n<p class=\"wp-block-paragraph\">1\u3064\u306b\u7d5e\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u8907\u6570\u5165\u308c\u308b\u3068\u540c\u3058\u51e6\u7406\u304c\u91cd\u8907\u3057\u3001\u5727\u7e2e\u6e08\u307f\u30d5\u30a1\u30a4\u30eb\u3092\u3055\u3089\u306b\u51e6\u7406\u3057\u3066\u8868\u793a\u304c\u58ca\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u753b\u50cf\u6700\u9069\u5316\u306b\u5bfe\u5fdc\u3057\u305f1\u3064\u3092\u5165\u308c\u3001\u8a2d\u5b9a\u30921\u9805\u76ee\u305a\u3064\u6709\u52b9\u5316\u3057\u3066\u8868\u793a\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u9032\u3081\u308b\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n<!-- \/withmedia-faq -->\n\n\n<!-- withmedia-related -->\n<h2 class=\"wp-block-heading\">\u3042\u308f\u305b\u3066\u8aad\u307f\u305f\u3044\u95a2\u9023\u8a18\u4e8b<\/h2>\n<ul class=\"wp-block-list\">\n<li><a 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