{"id":3426,"date":"2022-07-23T03:57:56","date_gmt":"2022-07-22T18:57:56","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=3426"},"modified":"2022-09-22T02:34:32","modified_gmt":"2022-09-21T17:34:32","slug":"javascript-how-to-speed-test","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/javascript-how-to-speed-test\/","title":{"rendered":"JavaScript\u3067\u7279\u5b9a\u306e\u51e6\u7406\u306e\u901f\u5ea6\u8a08\u6e2c\u306e\u3084\u308a\u65b93\u9078\uff5e\u51e6\u7406\u6642\u9593\u3092\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-how-to-speed-test\/#performance%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\" >performance\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3046\u65b9\u6cd5<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-how-to-speed-test\/#%E2%91%A0windowperformancenow%E3%83%A1%E3%82%BD%E3%83%83%E3%83%89%E3%81%A7%E8%A8%88%E6%B8%AC%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95\" >\u2460window.performance.now()\u30e1\u30bd\u30c3\u30c9\u3067\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-how-to-speed-test\/#%E2%91%A1windowperformancemark%E3%80%81windowperformancemeasure%E3%82%92%E4%BD%B5%E7%94%A8%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95\" >\u2461window.performance.mark()\u3001window.performance.measure()\u3092\u4f75\u7528\u3059\u308b\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/javascript-how-to-speed-test\/#console%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\" >console\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3046\u65b9\u6cd5<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">JavaScript\u306e\u51e6\u7406\u304c\u3069\u308c\u304f\u3089\u3044\u304b\u304b\u3063\u3066\u3044\u308b\u306e\u304b\u8abf\u67fb\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u91cd\u3044\u6c17\u304c\u3059\u308b\u3001\u51e6\u7406\u901f\u5ea6\u3092\u6539\u5584\u3057\u305f\u3044\u3001\u306a\u3069\u306a\u3069JavaScript\u306e\u901f\u3055\u3092\u8a08\u3063\u3066\u307f\u305f\u3044\u5834\u5408\u306a\u3069\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u5b9a\u306e\u30e1\u30bd\u30c3\u30c9\u9593\u3067\u4f55\u30df\u30ea\u79d2\u304b\u304b\u3063\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u306e\u304b\u3001\u3084\u3053\u306e\u30eb\u30fc\u30d7\u306b\u304b\u306a\u308a\u306e\u6642\u9593\u304b\u304b\u3063\u3066\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3001\u306a\u3069Web\u30da\u30fc\u30b8\u306e\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306e\u305f\u3081\u306b\u6539\u5584\u3092\u8003\u3048\u308b\u9053\u3057\u308b\u3079\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u662f\u975e\u3001\u899a\u3048\u3066\u5b9f\u8df5\u3067\u3082\u6d3b\u7528\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3042\u3001\u88dc\u8db3\u3067\u3059\u304c\u3001\u3053\u306e\u30fc\u30da\u30fc\u30b8\u3092Chrome\u306e\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u958b\u304d\u306a\u304c\u3089\u8aad\u3080\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u30bf\u30d6\u3092\u958b\u3044\u3066\u307f\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"performance%E3%83%97%E3%83%AD%E3%83%91%E3%83%86%E3%82%A3%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\"><\/span>performance\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u4f7f\u3046\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\u306eWindow\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306fperformance\u3068\u3044\u3046\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u542b\u307e\u308c\u308b<code>now()<\/code>\u30e1\u30bd\u30c3\u30c9\u3001<code>mark()<\/code>\u30e1\u30bd\u30c3\u30c9\u3001<code>measure()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u305d\u308c\u305e\u308c\u4f7f\u3063\u3066\u3001JavaScript\u306e\u51e6\u7406\u901f\u5ea6\u3092\u8a08\u6e2c\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E2%91%A0windowperformancenow%E3%83%A1%E3%82%BD%E3%83%83%E3%83%89%E3%81%A7%E8%A8%88%E6%B8%AC%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95\"><\/span>\u2460window.performance.now()\u30e1\u30bd\u30c3\u30c9\u3067\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">(window.)performance.now()\u30e1\u30bd\u30c3\u30c9\u306f\u30de\u30a4\u30af\u30ed\u79d2\u7cbe\u5ea6\u306e\u7d50\u679c\u3092\u53d6\u5f97\u51fa\u6765\u307e\u3059\u3002\u8fd4\u3055\u308c\u308b\u5024\u306e\u5358\u4f4d\u306f\u30df\u30ea\u79d2\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u300c1960.199999999255\u30df\u30ea\u79d2\u300d\u306e\u3088\u3046\u306b\u5c0f\u6570\u70b9\u7b2c\u5341\u4e8c\u4f4d\u307e\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"performance.now.js\" data-lang=\"JavaScript\"><code>console.log( performance.now() ); \/\/ window.\u306f\u7701\u7565\u53ef<\/code><\/pre><\/div>\n\n\n\n<script>\nconsole.log(\"performance.now():\" + window.performance.now());\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">Google Chrome\u3092\u304a\u4f7f\u3044\u306e\u65b9\u306f\u3053\u306e\u30da\u30fc\u30b8\u4e0a\u3067\uff08F12\u30ad\u30fc\u3067\uff09\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u958b\u304d\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u30ed\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u300cperformance.now():1960.199999999255\u300d\u306e\u3088\u3046\u306a\u30ed\u30b0\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e<code>performance.now()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8aad\u307f\u8fbc\u307f\u958b\u59cb\u304b\u3089\u306e\u30df\u30ea\u79d2\u3092\u8fd4\u3059\u306e\u3067\u3001\u3053\u308c\u5358\u4f53\u3067\u306f\u7279\u5b9a\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u51e6\u7406\u6642\u9593\u3092\u8a08\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u305b\u3093\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u3053\u3067\u3001<code>performance.now()<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u81ea\u4f5c\u30b3\u30fc\u30c9\u3092<strong>\u631f\u3093\u3067<\/strong>\u3084\u308a\u3001\u524d\u5f8c\u306e<strong>\u5dee<\/strong>\u3092\u898b\u3066\u51e6\u7406\u306b\u4f55\u79d2\u304b\u304b\u3063\u305f\u306e\u304b\u3092\u77e5\u308b\u3068\u3044\u3046\u7d50\u69cb\u539f\u59cb\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"performance.now-2.js\" data-lang=\"JavaScript\"><code>let beforeMethod = performance.now();\nlet sampleFunc = function(){\n  let intTest = 0;\n  for(let i=0; i&lt;1000000; i++) {  \/\/ \u4f8b\u3068\u3057\u30661,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    intTest += 10;\n  }\n  console.log(&#39;intTest : &#39; + intTest);\n}();\nlet afterMethod = performance.now();\n\nconsole.log(&quot;1,000,000\u56de10\u3092\u8db3\u3059\u51e6\u7406\u6642\u9593\u306f\u3001&quot; + (afterMethod - beforeMethod) + &quot;\u30df\u30ea\u79d2\u3067\u3059&quot;);<\/code><\/pre><\/div>\n\n\n\n<script>\nlet beforeMethod = performance.now();\nlet sampleFunc = function(){\n  let intTest = 0;\n  for(let i=0; i<1000000; i++) {  \/\/ \u4f8b\u3068\u3057\u30661,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    intTest += 10;\n  }\n  console.log('intTest : '+intTest);\n}();\nlet afterMethod = performance.now();\n\nconsole.log(\"1,000,000\u56de10\u3092\u8db3\u3059\u51e6\u7406\u6642\u9593\u306f\u3001\" + (afterMethod - beforeMethod) + \"\u30df\u30ea\u79d2\u3067\u3059\");\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u307b\u3069\u3068\u540c\u69d8\u306bGoogle Chrome\u306e\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u4e0a\u3067\u30b3\u30f3\u30bd\u30fc\u30eb\u753b\u9762\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u300c1,00,000\u56de10\u3092\u8db3\u3059\u51e6\u7406\u6642\u9593\u306f\u30010.19999998807907104\u30df\u30ea\u79d2\u3067\u3059\u300d\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u51fa\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u3087\u3046\u304b\uff1f\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u65b9\u6cd5\u306f\u8a08\u6e2c\u3057\u305f\u3044\u30ed\u30b8\u30c3\u30af\u90e8\u5206\u3092<code>performance.now()<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u631f\u3093\u3067\u5dee\u5206\u3092\u898b\u3066\u51e6\u7406\u6642\u9593\u3092\u7b97\u51fa\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u5206\u304b\u308a\u3084\u3059\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5c11\u3057\u5165\u308a\u7d44\u3093\u3060\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u5c11\u3005\u624b\u9593\u304c\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u305d\u3046\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u3053\u3067<strong>\u6b21\u306e\u65b9\u6cd5\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u8907\u96d1\u306a\u8a08\u6e2c\u3092\u4e00\u5143\u7684\u306b\u96c6\u7d04\u3057\u3084\u3059\u304f\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059<\/strong>\u3002<\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E2%91%A1windowperformancemark%E3%80%81windowperformancemeasure%E3%82%92%E4%BD%B5%E7%94%A8%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95\"><\/span>\u2461window.performance.mark()\u3001window.performance.measure()\u3092\u4f75\u7528\u3059\u308b\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>performance.mark()<\/code>\u30e1\u30bd\u30c3\u30c9\u304c<code>performance.now()<\/code>\u30e1\u30bd\u30c3\u30c9\u3068\u5927\u304d\u304f\u7570\u306a\u308b\u70b9\u306f\u3001\u300c\u6307\u5b9a\u3057\u305f\u540d\u524d\u3067\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u4f5c\u6210\u300d\u51fa\u6765\u308b\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3046\u3044\u3046\u3053\u3068\u304b\u3068\u3044\u3046\u3068\u3001<code>performance.now()<\/code>\u306b\u306f\"\u547d\u540d\"\u3068\u3044\u3046\u6982\u5ff5\u304c\u306a\u304f\u3001\u5358\u7d14\u306b\u6642\u9593\uff08\u30df\u30ea\u79d2\uff09\u3092\u8fd4\u3059\u3060\u3051\u3067\u3057\u305f\u3002\u305d\u308c\u306b\u5bfe\u3057\u3066<code>performance.mark()<\/code>\u306f\u30d6\u30e9\u30a6\u30b6\u30fc\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30a8\u30f3\u30c8\u30ea\u30fc\u30d0\u30c3\u30d5\u30a1\u30fc\u3078\u540d\u524d\u3068\u3068\u3082\u306b\u6642\u9593\uff08\u30df\u30ea\u79d2\uff09\u3092\u767b\u9332\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u51fa\u6765\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e<code>mark()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u8907\u6570\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u30de\u30fc\u30af\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u3001\u5f8c\u3005\u305d\u306e\u30dd\u30a4\u30f3\u30c8\u306e\u6307\u5b9a\u3092<code>measure()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u89b3\u6e2c\u70b9\u3092\u5909\u3048\u3089\u308c\u308b\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u306a\u3093\u3060\u304b\u3093\u3060\u8aac\u660e\u3059\u308b\u3088\u308a\u3082\u5b9f\u969b\u306b\u3069\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u3070\u3088\u3044\u304b\u3054\u89a7\u306b\u306a\u3063\u305f\u65b9\u304c\u65e9\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"performance.mark-1.js\" data-lang=\"JavaScript\"><code>performance.mark(&#39;pfm-mark-01&#39;); \/\/ \uff08\uff11\uff091\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\nlet sampleFunc02 = function(){\n  let v = 0;\n  for(let i=0; i&lt;1000000; i++) {  \/\/ \u4f8b\u3068\u3057\u30661,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    v += 10;\n  }\n  console.log(&#39;v : &#39; + v );\n}();\nperformance.mark(&#39;pfm-mark-02&#39;); \/\/ \uff08\uff12\uff092\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\nlet sampleFunct03 = function(){\n  let w = 0;\n  for(let i=0; i&lt;10000000; i++) {  \/\/ \u4f8b\u3068\u3057\u306610,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    w += 10;\n  }\n  console.log(&#39;w : &#39; + w );\n}();\nperformance.mark(&#39;pfm-mark-03&#39;); \/\/ \uff08\uff13\uff093\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\n\nperformance.measure( \/\/ \n    &#39;pfm-measure&#39;, \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\n    &#39;pfm-mark-01&#39;, \/\/ \u958b\u59cb\u70b9\uff08\uff11\uff09\n    &#39;pfm-mark-02&#39; \/\/ \u7d42\u4e86\u70b9\uff08\uff12\uff09\n);\nperformance.measure(\n    &#39;pfm-measure-02&#39;, \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\n    &#39;pfm-mark-02&#39;, \/\/ \u958b\u59cb\u70b9\uff08\uff12\uff09\n    &#39;pfm-mark-03&#39; \/\/ \u7d42\u4e86\u70b9\uff08\uff13\uff09\n);\n\n\/\/ \u7d50\u679c\u306e\u53d6\u5f97\nconst results = performance.getEntriesByName(&#39;pfm-measure&#39;); \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u304b\u3089\u7d50\u679c\u3092\u53d6\u5f97\uff08\uff11\uff09\uff5e\uff08\uff12\uff09\nconst results2 = performance.getEntriesByName(&#39;pfm-measure-02&#39;); \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u304b\u3089\u7d50\u679c\u3092\u53d6\u5f97\uff08\uff12\uff09\uff5e\uff08\uff13\uff09\n\n\/\/ \u30df\u30ea\u79d2\u306e\u5dee\u5206\u306fresults[0]\u306eduration\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u53c2\u7167\u3059\u308b\u3053\u3068\nconsole.log(&quot;sampleFunc02\u306e\u51e6\u7406\u6642\u9593 : &quot; + results[0].duration + &quot;\u30df\u30ea\u79d2&quot;); \/\/ \uff08\uff11\uff09\uff5e\uff08\uff12\uff09\nconsole.log(&quot;sampleFunc03\u306e\u51e6\u7406\u6642\u9593 : &quot; + results2[0].duration + &quot;\u30df\u30ea\u79d2&quot;); \/\/ \uff08\uff12\uff09\uff5e\uff08\uff13\uff09<\/code><\/pre><\/div>\n\n\n\n<script>\nperformance.mark('pfm-mark-01') \/\/ \uff08\uff11\uff091\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\nlet sampleFunc02 = function(){\n  let v = 0;\n  for(let i=0; i<1000000; i++) {  \/\/ \u4f8b\u3068\u3057\u30661,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    v += 10;\n  }\n  console.log('v : ' + v );\n}();\nperformance.mark('pfm-mark-02') \/\/ \uff08\uff12\uff092\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\nlet sampleFunct03 = function(){\n  let w = 0;\n  for(let i=0; i<10000000; i++) {  \/\/ \u4f8b\u3068\u3057\u306610,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    w += 10;\n  }\n  console.log('w : ' + w );\n}();\nperformance.mark('pfm-mark-03') \/\/ \uff08\uff13\uff093\u3064\u76ee\u306e\u8a08\u6e2c\u70b9\u306e\u30de\u30fc\u30ad\u30f3\u30b0\n\nperformance.measure( \/\/ \n    'pfm-measure', \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\n    'pfm-mark-01', \/\/ \u958b\u59cb\u70b9\uff08\uff11\uff09\n    'pfm-mark-02' \/\/ \u7d42\u4e86\u70b9\uff08\uff12\uff09\n);\nperformance.measure(\n    'pfm-measure-02', \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\n    'pfm-mark-02', \/\/ \u958b\u59cb\u70b9\uff08\uff12\uff09\n    'pfm-mark-03' \/\/ \u7d42\u4e86\u70b9\uff08\uff13\uff09\n);\n\n\/\/ \u7d50\u679c\u306e\u53d6\u5f97\nconst results = performance.getEntriesByName('pfm-measure'); \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u304b\u3089\u7d50\u679c\u3092\u53d6\u5f97\uff08\uff11\uff09\uff5e\uff08\uff12\uff09\nconst results2 = performance.getEntriesByName('pfm-measure-02'); \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u304b\u3089\u7d50\u679c\u3092\u53d6\u5f97\uff08\uff12\uff09\uff5e\uff08\uff13\uff09\n\n\/\/ \u30df\u30ea\u79d2\u306e\u5dee\u5206\u306fresults[0]\u306eduration\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u53c2\u7167\u3059\u308b\u3053\u3068\nconsole.log(\"sampleFunc02\u306e\u51e6\u7406\u6642\u9593 : \" + results[0].duration + \"\u30df\u30ea\u79d2\"); \/\/ \uff08\uff11\uff09\uff5e\uff08\uff12\uff09\nconsole.log(\"sampleFunc03\u306e\u51e6\u7406\u6642\u9593 : \" + results2[0].duration + \"\u30df\u30ea\u79d2\"); \/\/ \uff08\uff12\uff09\uff5e\uff08\uff13\uff09\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a08\u6e2c\u3092\u958b\u59cb\u3057\u305f\u3044\u5834\u6240\u306b\u4f8b\u3048\u3070<code>performance.mark('pfm-mark-01');<\/code>\u306e\u3088\u3046\u306b\u300cpfm-mark-01\u300d\u3068\u3044\u3046\u540d\u524d\u3092\u4f7f\u3063\u3066\u89b3\u6e2c\u70b9\u3092\u8a2d\u7f6e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30de\u30fc\u30ad\u30f3\u30b0\u306f\u8907\u6570\u8a2d\u7f6e\u3067\u304d\u308b\u306e\u3067\u304a\u597d\u307f\u306e\u4f4d\u7f6e\u306b\u3001<code>performance.mark('pfm-mark-02');<\/code>\u3092\u8a2d\u7f6e\u3057\u3066\u3082\u5927\u4e08\u592b\u3067\u3059\u30021\u500b\u76ee\u306e\u30de\u30fc\u30ad\u30f3\u30b0\u3068\u306f\u540d\u524d\u3092\u5909\u3048\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u89b3\u6e2c\u7d42\u4e86\u70b9\u306b\u306f<code>performance.mark('pfm-mark-03');<\/code>\u3092\u7f6e\u304d\u3001\u6e96\u5099\u306f\u5b8c\u4e86\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7d42\u7684\u306b\u51e6\u7406\u901f\u5ea6\u306e\u8a08\u6e2c\u3092\u884c\u3046\u306b\u306f\u3001<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"performance.measure.js\" data-lang=\"JavaScript\"><code>performance.measure(\n    &#39;pfm-measure-02&#39;, \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\n    &#39;pfm-mark-02&#39;, \/\/ \u958b\u59cb\u70b9\uff08\uff12\uff09\n    &#39;pfm-mark-03&#39; \/\/ \u7d42\u4e86\u70b9\uff08\uff13\uff09\n);\n\/\/ \u7d50\u679c\u306e\u53d6\u5f97\nconst results = performance.getEntriesByName(&#39;pfm-measure&#39;);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u3088\u3046\u306b<code>performance.measure()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u51e6\u7406\u6642\u9593\u306e\u30df\u30ea\u79d2\u3092\u53d6\u5f97\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>measure()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\u4e00\u5f15\u6570\u306b\u306f\u3001\u30d0\u30c3\u30d5\u30a1\u3068\u3057\u3066\u6307\u5b9a\u3057\u305f\u3044\u540d\u524d\u3092\u5165\u308c\uff08\u5206\u304b\u308a\u3084\u3059\u3051\u308c\u3070\u4f55\u3067\u3082\u5927\u4e08\u592b\u3067\u3059\uff09\u3001\u7b2c\u4e8c\u5f15\u6570\u306b\u306f\u958b\u59cb\u306e\u89b3\u6e2c\u70b9\u306e\u540d\u524d\u3092\u3001\u7b2c\u4e09\u5f15\u6570\u306b\u306f\u7d42\u4e86\u306e\u89b3\u6e2c\u70b9\u306e\u540d\u524d\u3092\u30bb\u30c3\u30c8\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5168\u4f53\u7684\u306a\u30df\u30ea\u79d2\u306e\u53d6\u5f97\u306f\u3001\u4e0a\u8a18\u306e<code>measure()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u5f8c\u306b<code>performance.getEntriesByName()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u884c\u3044\u307e\u3059\u3002\u5fd8\u308c\u304c\u3061\u306a\u306e\u3067<code>measure()<\/code>\u306e\u5f8c\u3067<code>getEntriesByName()<\/code>\u3067\u5b9f\u6e2c\u5024\u3092\u5f97\u308b\u3001\u3068\u3044\u3046\u3088\u3046\u306b\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"console%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\"><\/span>console\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3046\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">window.console\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3063\u3066\u6642\u9593\u3092\u8a08\u6e2c\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<br>\u4f7f\u7528\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3001<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>console.time()<\/code>\u30e1\u30bd\u30c3\u30c9<\/li><li><code>consele.timeLog()<\/code>\u30e1\u30bd\u30c3\u30c9<\/li><li><code>console.timeEnd()<\/code>\u30e1\u30bd\u30c3\u30c9<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u306e3\u7a2e\u985e\u3067\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-file=\"console.time.js\" data-lang=\"JavaScript\"><code>console.time(&#39;cons-time&#39;) \/\/ \u8a08\u6e2c\u958b\u59cb\u306ftime(&#39;\u4efb\u610f\u306e\u540d\u524d\u30fb\u8b58\u5225\u7528&#39;);\nlet sampleFunc04 = function(){\n  let x = 0;\n  for(let i=0; i&lt;100000000; i++) {  \/\/ \u4f8b\u3068\u3057\u3066100,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    x += 10;\n  }\n  console.timeLog(&#39;cons-time&#39;); \/\/ \u9014\u4e2d\u7d4c\u904e\u3092\u51fa\u3057\u305f\u3044\u5834\u5408\u306ftimeLog(&#39;\u6700\u521d\u306b\u8a2d\u5b9a\u3057\u305f\u540d\u524d&#39;);\n  console.log(&#39;x : &#39; + x );\n}();\nconsole.timeEnd(&#39;cons-time&#39;); \/\/ \u7d42\u4e86\u6642\u3001time(&#39;\u6700\u521d\u306e\u540d\u524d&#39;)\uff5etimeEnd(&#39;\u6700\u521d\u306e\u540d\u524d&#39;)\u307e\u3067\u306e\u30df\u30ea\u79d2<\/code><\/pre><\/div>\n\n\n\n<script>\nconsole.time('cons-time') \/\/ \u8a08\u6e2c\u958b\u59cb\u306ftime('\u4efb\u610f\u306e\u540d\u524d\u30fb\u8b58\u5225\u7528');\nlet sampleFunc04 = function(){\n  let x = 0;\n  for(let i=0; i<100000000; i++) {  \/\/ \u4f8b\u3068\u3057\u3066100,000,000\u56de10\u3092\u8db3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\n    x += 10;\n  }\n  console.timeLog('cons-time'); \/\/ \u9014\u4e2d\u7d4c\u904e\u3092\u51fa\u3057\u305f\u3044\u5834\u5408\u306ftimeLog('\u6700\u521d\u306b\u8a2d\u5b9a\u3057\u305f\u540d\u524d');\n  console.log('x : ' + x );\n}();\nconsole.timeEnd('cons-time'); \/\/ \u7d42\u4e86\u6642\u3001time('\u6700\u521d\u306e\u540d\u524d')\uff5etimeEnd('\u6700\u521d\u306e\u540d\u524d')\u307e\u3067\u306e\u30df\u30ea\u79d2\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\"><code>console.time()<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001<code>console.log()<\/code>\u3067\u51fa\u529b\u51e6\u7406\u3092\u3057\u306a\u304f\u3066\u3082\u81ea\u52d5\u7684\u306b\u30b3\u30f3\u30bd\u30fc\u30eb\u4e0a\u306b\u30df\u30ea\u79d2\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p 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