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· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

55

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
g.csdnimg.cn/common/csdn-toolbar/csdn-toolbar.js?v=17168846273401800.0 s44.8 KiB
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s240.4 KiB
cdn-news.gitcode.com/news/csdn-pic-19.png0.0 ms21.3 KiB
g.csdnimg.cn/common/csdn-report/report.js1800.0 s21.6 KiB
g.csdnimg.cn/common/csdn-report/report.js1800.0 s21.6 KiB
cdn-news.gitcode.com/news/csdn-pic-17.png0.0 ms18.3 KiB
g.csdnimg.cn/common/csdn-login-box/csdn-login-box.js1800.0 s16.8 KiB
g.csdnimg.cn/common/csdn-toolbar/csdn-toolbar-default.css1800.0 s13.6 KiB
cdn-news.gitcode.com/news/csdn-pic-6.png0.0 ms6.6 KiB
cdn-news.gitcode.com/news/csdn-pic-1.png0.0 ms6.3 KiB
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s56.3 KiB
cdn-news.gitcode.com/news/csdn-pic-20.png0.0 ms5.6 KiB
g.csdnimg.cn/user-ordertip/3.0.2/user-ordertip.js?t=3.0.21800.0 s4.8 KiB
cdn-news.gitcode.com/news/csdn-pic-7.png0.0 ms3.6 KiB
g.csdnimg.cn/user-ordertip/3.0.2/user-ordertip.css1800.0 s3.0 KiB
g.csdnimg.cn/common/csdn-cert-new/csdn-cert-new.js1800.0 s1.6 KiB
g.csdnimg.cn/common/csdn-footer/images/badge.png1800.0 s1.6 KiB
/1.png?p=986&adBlockFlag=0&adId=1094647&a=1094647&c=40291...0.0 ms1.3 KiB
/1.png?p=585&adBlockFlag=0&adId=1096918&a=1096918&c=40567...0.0 ms1.3 KiB
/1.png?p=588&adBlockFlag=0&adId=1095745&a=1095745&c=40369...0.0 ms1.3 KiB
/1.png?p=589&adBlockFlag=0&adId=1096143&a=1096143&c=40408...0.0 ms1.3 KiB
/1.png?p=590&adBlockFlag=0&adId=1095722&a=1095722&c=40341...0.0 ms1.3 KiB
/1.png?p=591&adBlockFlag=0&adId=1096915&a=1096915&c=40564...0.0 ms1.3 KiB
/1.png?p=592&adBlockFlag=0&adId=1094615&a=1094615&c=40287...0.0 ms1.3 KiB
g.csdnimg.cn/common/csdn-toolbar/images/csdn-white-search.png1800.0 s1.3 KiB
kunpeng-render.csdnimg.cn/publisher/latest/closeAdFrame.js3600.0 s1.1 KiB
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s7.4 KiB
g.csdnimg.cn/common/csdn-toolbar/images/toolbar-triangle-white.png1800.0 s563 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s4.7 KiB
g.csdnimg.cn/common/csdn-toolbar/images/arrowdown-16.png1800.0 s411 B
kunpeng-sc.csdnimg.cn/static/js/7.8691cce78f33f2a24406.js604800.0 s3.3 KiB
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s3.0 KiB
g.csdnimg.cn/common/csdn-toolbar/images/icon-add-16.png1800.0 s348 B
g.csdnimg.cn/common/csdn-toolbar/images/mini-menus-icon.png1800.0 s345 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s1.3 KiB
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/css/app.9c84aef4e4bef9be84507d73cfd406d9.css604800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
g.csdnimg.cn/common/csdn-report/report.js1800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/app.9ba308e76c9b924ecf99.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/7.8691cce78f33f2a24406.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/6.ea6a3a4d3a98014c87ab.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/0.a6df606f7bc7c601fa32.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B
kunpeng-sc.csdnimg.cn/static/js/manifest.5775c95f9083f0b1fa18.js604800.0 s0 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:43.804 source:map[column:26967 line:1 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:5.471 source:map[column:196565 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:4.154 source:map[column:71188 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:73.164 source:map[column:56091 line:14 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/common.88e6eac5.js urlProvider:network]] map[reflowTime:26.073 source:map[type:text value:[unattributed]]] map[reflowTime:1.843 source:map[column:31379 line:1 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:1.207 source:map[column:936 line:0 type:source-location url:https://g.csdnimg.cn/side-toolbar/3.4/side-toolbar.js urlProvider:network]] map[reflowTime:4.94 source:map[column:971 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:0.284 source:map[column:1100 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:0.217 source:map[column:1411 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:0.233 source:map[column:1473 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:3.051 source:map[column:1682 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:0.493 source:map[column:1758 line:2 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:25.166 source:map[column:14101 line:0 type:source-location url:https://g.csdnimg.cn/tingyun/tingyun.js urlProvider:network]] map[reflowTime:8.554 source:map[column:27484 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:26.312 source:map[column:26389 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.391 source:map[column:26518 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.241 source:map[column:26828 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.335 source:map[column:26890 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.566 source:map[column:27147 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.479 source:map[column:27223 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.191 source:map[column:29573 line:2 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:6.192 source:map[column:72100 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:0.391 source:map[column:72247 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:0.385 source:map[column:7591 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/common.88e6eac5.js urlProvider:network]] map[reflowTime:0.061 source:map[column:7694 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/common.88e6eac5.js urlProvider:network]] map[reflowTime:0.16 source:map[column:464 line:0 type:source-location url:https://g.csdnimg.cn/??asdf/1.1.3/trackad.js,iconfont/nav/iconfont-1.0.1.js urlProvider:network]] map[reflowTime:0.338 source:map[column:30763 line:3 type:source-location url:https://g.csdnimg.cn/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-tooltip.js,lib/qrcode/1.0.0/qrcode.min.js urlProvider:network]] map[reflowTime:0.223 source:map[column:71804 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:0.092 source:map[column:71898 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:0.04 source:map[column:72045 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/www-index-side/index.235fb6c9.js urlProvider:network]] map[reflowTime:0.099 source:map[column:30288 line:0 type:source-location url:https://csdnimg.cn/release/cmsfe/public/js/chunk/common.88e6eac5.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.home-info > div.home-info-banner > a#banner-box > div.banner-img div.home-info > div.home-info-banner > a#banner-box > div.banner-img
i-operation.csdnimg.cn/images/6f10b29cde7748a7902915ecdcefbd2c.png980.8 KiB857.5 KiB
div.home-info > div.home-info-banner > a#banner-box > div.banner-img div.home-info > div.home-info-banner > a#banner-box > div.banner-img
i-operation.csdnimg.cn/images/d53798e1496a44c4ada99e647405a497.png924.6 KiB819.5 KiB
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/ad/ad_pic/e656fa16652048d381a8168b62bc4b6a.png770.8 KiB759.7 KiB
div.home-info > div.home-info-banner > a#banner-box > div.banner-img div.home-info > div.home-info-banner > a#banner-box > div.banner-img
i-operation.csdnimg.cn/images/9844231d768b457b87624ca87e1896b6.png596.6 KiB495.0 KiB
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/ad/ad_pic/d851ad0cd0954b8da491357ca0a5ed33.png439.3 KiB428.2 KiB
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/ad/ad_pic/6fc0d4eef96f4400bc834f36a9c3fa5a.jpeg452.8 KiB421.7 KiB
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/ad/ad_pic/314e3d97d59e428d99ea7a954e27acd8.jpeg193.7 KiB182.6 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/0ba34ac20b464f08a9efa3cf651dcdfa.png?x-oss-proces...189.0 KiB177.4 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/5528809b2bfb4acda6084cc806ce165e.png?x-oss-proces...174.6 KiB163.1 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/3aad4a9c15bd47edbf489815834bbe12.png?x-oss-proces...152.2 KiB140.6 KiB
div.home-info > div.home-info-banner > a#banner-box > img div.home-info > div.home-info-banner > a#banner-box > img
img-home.csdnimg.cn/images/20241216100640.jpg172.6 KiB139.5 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230306070808940.jpg131.1 KiB130.6 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/35d67e0e9ad442c097cf7ce2cf35e7d6.png?x-oss-proces...140.7 KiB129.1 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/f09bd6a71b194f1a92951ab0ebdc491e.png?x-oss-proces...139.3 KiB127.7 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/aea65e159fc44b8693d1c05d98d5eb34.png?x-oss-proces...128.0 KiB116.4 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230306064258203.jpg107.2 KiB106.5 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230310013332272.jpg86.0 KiB85.3 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/e06c68b31cb54fad9af33da1d55c1bba_qq_45546772.jpg!184.1 KiB84.1 KiB
div.home-info > div.home-info-banner > a#banner-box > div.banner-img div.home-info > div.home-info-banner > a#banner-box > div.banner-img
i-blog.csdnimg.cn/direct/02120f245c704e9a87162bc665d838ef.png89.4 KiB77.8 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/12ca8ea42b05465c8522f380b4d3f722.png?x-oss-proces...88.0 KiB76.5 KiB
div.toolbar-btn > div.csdn-toolbar-creative-mp > a > img div.toolbar-btn > div.csdn-toolbar-creative-mp > a > img
i-operation.csdnimg.cn/images/6e41bd372d1f4ec39b3cd36ab95046c4.png78.9 KiB74.9 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20240118105844.jpg72.2 KiB72.1 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/ff94cface9db4518829cfbc6d78d9106.png?x-oss-proces...83.0 KiB71.4 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230310014808316.jpg69.3 KiB68.9 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/bb8ad0692c2547fbae8f00d6d5fe79b0_m0_71444338.jpg!167.7 KiB67.6 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/cfc85100274040cf86eae822e6cd914f_2401_83127407.jpg!160.5 KiB60.4 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230209093821579.jpg58.4 KiB58.1 KiB
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230209093835884.jpg57.0 KiB56.5 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20250512034618.png51.1 KiB50.9 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/3ce9cb5a245f4eaa97c5e976d85acfee_m0_66434421.jpg!150.2 KiB50.2 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/4f23dd8c66f945bd9fd39a894a0f4956_jackxiaochen.jpg!149.8 KiB49.7 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/48a781568e9444168841594019270411_no1coder.jpg!145.3 KiB45.3 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/e793aaad88df428fb134bad817dcfee4_TwoCat_C.jpg!144.2 KiB44.2 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/aa5dce552cfb44c181a939bfc2de62db_weixin_39789918.jpg!144.2 KiB44.1 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/a797880fb4d74c00a2c0616e4e0c8e43_fghyibib.jpg!141.9 KiB41.9 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/2f10957635a446cebdba3d48b13544ad_mdx3SaX3T.jpg!141.2 KiB41.2 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/2c25b75b4d3e4a45a772979ce2ed3204_m0_59777389.jpg!141.0 KiB40.9 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/01d17d01c0b64e1c899440f283b714f0_weixin_41908519.jpg!140.6 KiB40.5 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/2d87718a0b204bc9af02e5a94c214a53_dreamy_zsy.jpg!140.4 KiB40.3 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/34633bfb99aa476798084c39c2d56639.png?x-oss-proces...50.4 KiB38.8 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/7528a9955f874d84b81b86e37ac801d0_xin_yao_xin.jpg!136.3 KiB36.2 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/713b78d49ccd47d6983f33b5d0a38330_qq_28421487.jpg!136.2 KiB36.2 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/f462c249275f4fe8ad3f2ffbb9859731_IOT5570.jpg!135.7 KiB35.6 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20251229014546.png35.5 KiB35.4 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/b277af45318d4611b91ae40b1deb94fc_qq_41797451.jpg!134.7 KiB34.7 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/82cc274375f84f3f971b30290679ad3f.png?x-oss-proces...45.0 KiB33.4 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/98237793ead34cb5b103295abe33b67b.png?x-oss-proces...44.7 KiB33.1 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20250211044429.png32.7 KiB32.5 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/13c52b9b265e4146a55ed12c543b32d4.png?x-oss-proces...41.4 KiB29.8 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/51603baf8aab4f26b69b682072a30d4b.png?x-oss-proces...36.4 KiB24.8 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20250924103813.png22.4 KiB22.4 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/b6a97467b771425eb1836d97428ae5b4_weixin_37800531.jpg!120.2 KiB20.1 KiB
div.ContentBlock > div.ContentBlockItem > div.top > img.left div.ContentBlock > div.ContentBlockItem > div.top > img.left
img-home.csdnimg.cn/images/20250211044156.png20.0 KiB20.0 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/0c72270df333452fb500e4750bcdea8e.jpg!119.7 KiB19.6 KiB
div.el-carousel__container > div.el-carousel__item > a.project-item > div.project-banner div.el-carousel__container > div.el-carousel__item > a.project-item > div.project-banner
i-blog.csdnimg.cn/direct/5d17699311844ad8b1307330e2ed5c18.png28.0 KiB16.4 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
profile-avatar.csdnimg.cn/default.jpg!116.1 KiB16.1 KiB
div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner div.article-item > div.article-item-cont > a.artivle-item-right > div.back-img-banner
/direct/a49568f15807427795399e257f23cfd5.png?x-oss-proces...21.8 KiB10.2 KiB
div.toolbar-container-left > div.toolbar-logo > a > img div.toolbar-container-left > div.toolbar-logo > a > img
img-home.csdnimg.cn/images/20201124032511.png7.7 KiB7.2 KiB
div.el-carousel__container > div.el-carousel__item > a.project-item > div.project-banner div.el-carousel__container > div.el-carousel__item > a.project-item > div.project-banner
cdn-news.gitcode.com/news/csdn-pic-19.png20.4 KiB5.7 KiB
新客开通会员 立减60 div.toolbar-btn > div#csdn-toolbar-profile-nologin > div.csdn-toolbar-by-box > a.csdn-toolbar-by
i-operation.csdnimg.cn/images/f4277e752ed14e15b6a7386f80c4c76e.png6.8 KiB5.6 KiB
div.article-item-box > div.article-item > a.user-info > img div.article-item-box > div.article-item > a.user-info > img
i-avatar.csdnimg.cn/9e0eac2471094aaeaec6387f831c3b93_Cathyguu.jpg!15.6 KiB5.5 KiB
div.toolbar-container-mini-middle > div.toolbar-search > div.toolbar-search-container > span.icon-fire div.toolbar-container-mini-middle > div.toolbar-search > div.toolbar-search-container > span.icon-fire
img-home.csdnimg.cn/images/20201218055848.png8.1 KiB5.1 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:1843.597 label:Time to first byte subpart:timeToFirstByte] map[duration:582.151 label:Resource load delay subpart:resourceLoadDelay] map[duration:119.684 label:Resource load duration subpart:resourceLoadDuration] map[duration:1186.538 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-DIV
nodeLabel: div.home-info > div.home-info-banner > a#banner-box > div.banner-img
path: 1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,2,DIV,0,MAIN,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,2,A,1,DIV
selector: div.home-info > div.home-info-banner > a#banner-box > div.banner-img
snippet: <div class="banner-img" style="background-image: url(&quot;https://i-operation.csdnimg.cn/images/6f10b29cde7748a…&quot;);" data-v-dcd98fa0="">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV
nodeLabel: div.home-info > div.home-info-banner > a#banner-box > div.banner-img
path: 1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,2,DIV,0,MAIN,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,2,A,1,DIV
selector: div.home-info > div.home-info-banner > a#banner-box > div.banner-img
snippet: <div class="banner-img" style="background-image: url(&quot;https://i-operation.csdnimg.cn/images/6f10b29cde7748a…&quot;);" data-v-dcd98fa0="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
g.csdnimg.cn/tingyun/tingyun.js28.8 KiB82 ms
/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-...43.3 KiB82 ms
g.csdnimg.cn/common/csdn-report/report.js21.6 KiB
g.csdnimg.cn/user-ordertip/3.0.2/user-ordertip.js?t=3.0.24.8 KiB
g.csdnimg.cn/user-ordercart/2.0.1/user-ordercart.js?ts=2.0.12.8 KiB
csdnimg.cn/release/cmsfe/public/css/common.188d97b8.css50.7 KiB298 ms
csdnimg.cn/release/cmsfe/public/css/tpl/www-index-side/index.dbeabf54.css8.0 KiB

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
csdnimg.cn/release/cmsfe/public/font/element-icons.535877f5.woff20 ms

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
cdn-news.gitcode.com/news/csdn-pic-7.pnghttp/1.1
cdn-news.gitcode.com/news/csdn-pic-20.pnghttp/1.1
cdn-news.gitcode.com/news/csdn-pic-1.pnghttp/1.1
cdn-news.gitcode.com/news/csdn-pic-17.pnghttp/1.1
cdn-news.gitcode.com/news/csdn-pic-6.pnghttp/1.1
cdn-news.gitcode.com/news/csdn-pic-19.pnghttp/1.1
/1.png?p=986&adBlockFlag=0&adId=1094647&a=1094647&c=40291...http/1.1
/1.png?p=585&adBlockFlag=0&adId=1096918&a=1096918&c=40567...http/1.1
/1.png?p=588&adBlockFlag=0&adId=1095745&a=1095745&c=40369...http/1.1
/1.png?p=589&adBlockFlag=0&adId=1096143&a=1096143&c=40408...http/1.1
/1.png?p=590&adBlockFlag=0&adId=1095722&a=1095722&c=40341...http/1.1
/1.png?p=591&adBlockFlag=0&adId=1096915&a=1096915&c=40564...http/1.1
/1.png?p=592&adBlockFlag=0&adId=1094615&a=1094615&c=40287...http/1.1

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 930 ms
URLTime Spent
csdn.net/930 ms
www.csdn.net/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 60.7 KiB
URLTransfer SizeEst Savings
csdnimg.cn/release/cmsfe/public/css/common.188d97b8.css50.2 KiB48.6 KiB
g.csdnimg.cn/common/csdn-toolbar/csdn-toolbar-default.css13.4 KiB12.0 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 120 ms 182.1 KiB
URLTransfer SizeEst Savings
csdnimg.cn/release/cmsfe/public/js/chunk/common.88e6eac5.js218.1 KiB127.6 KiB
g.csdnimg.cn/common/csdn-toolbar/csdn-toolbar.js?v=171688462734044.2 KiB33.7 KiB
/??lib/jquery/1.12.4/jquery.min.js,user-tooltip/2.7/user-...43.0 KiB20.8 KiB

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation726 ms
Style & Layout671 ms
Other547 ms
Rendering120 ms
Script Parsing & Compilation90 ms
Parse HTML & CSS72 ms
Garbage Collection4.3 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable
The page has an unload handler in a sub frame.Actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
i-operation.csdnimg.cn/images/6f10b29cde7748a7902915ecdcefbd2c.png982.2 KiB
i-operation.csdnimg.cn/images/d53798e1496a44c4ada99e647405a497.png926.0 KiB
i-operation.csdnimg.cn/ad/ad_pic/78772298606142778a85c24866c74c84.png842.7 KiB
i-operation.csdnimg.cn/ad/ad_pic/e656fa16652048d381a8168b62bc4b6a.png772.0 KiB
i-operation.csdnimg.cn/ad/ad_pic/d6ebef0ce97f42f6aee8660b2de0e59e.png763.5 KiB
i-operation.csdnimg.cn/images/9844231d768b457b87624ca87e1896b6.png597.7 KiB
i-operation.csdnimg.cn/ad/ad_pic/6fc0d4eef96f4400bc834f36a9c3fa5a.jpeg453.7 KiB
i-operation.csdnimg.cn/ad/ad_pic/622189186c264e47874416652cf6a5bb.png442.1 KiB
i-operation.csdnimg.cn/ad/ad_pic/d851ad0cd0954b8da491357ca0a5ed33.png440.2 KiB
kunpeng-sc.csdnimg.cn/static/js/vendor.8d9c744c33b72ff5c469.js240.4 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div.home-info > div.home-info-banner > a#banner-box > img div.home-info > div.home-info-banner > a#banner-box > img
img-home.csdnimg.cn/images/20241216100640.jpg
div.home-info > div.home-info-banner > a#banner-box > img div.home-info > div.home-info-banner > a#banner-box > img
img-home.csdnimg.cn/images/20241216100640.jpg
div.home-info > div.home-info-banner > a#banner-box > img div.home-info > div.home-info-banner > a#banner-box > img
img-home.csdnimg.cn/images/20241216100640.jpg
div.home-info > div.home-info-banner > a#banner-box > img div.home-info > div.home-info-banner > a#banner-box > img
img-home.csdnimg.cn/images/20241216100640.jpg
div.layout-sidebar > div.layout-logo > a > img div.layout-sidebar > div.layout-logo > a > img
img-home.csdnimg.cn/images/20201124032511.png
div > div.csdn-side-toolbar > a.option-box > img div > div.csdn-side-toolbar > a.option-box > img
g.csdnimg.cn/side-toolbar/3.4/images/qr.png
div > div.csdn-side-toolbar > a.option-box > img div > div.csdn-side-toolbar > a.option-box > img
g.csdnimg.cn/side-toolbar/3.4/images/fanhuidingbucopy.png
div.toolbar-btns > div.toolbar-btn > a > img div.toolbar-btns > div.toolbar-btn > a > img
i-operation.csdnimg.cn/images/105eda9d414f4250a7c3fe45be3cd15f.png
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_extra > img.extra-image a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_extra > img.extra-image
i-operation.csdnimg.cn/images/2a0fd0811b8248e49d3d320e0dde5d06.png
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_extra > img.extra-image a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_extra > img.extra-image
i-operation.csdnimg.cn/images/4432e274ff494f5399a0439638314d82.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/8efd18d5d7054f77a81294a14cd80ad5.png
div.article-bottom > div.operation-b > p.operation-b-img > img div.article-bottom > div.operation-b > p.operation-b-img > img
i-operation.csdnimg.cn/images/e00b069b260c430da8547524b0c3b084.png
div.article-bottom > div.operation-b > a.operation-b-img > img div.article-bottom > div.operation-b > a.operation-b-img > img
i-operation.csdnimg.cn/images/519fd335c5d9433da31373064cf2c97b.png

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.7 s
●Avoid long main-thread tasks 6 long tasks found
●Network Requests
●Network Round Trip Times 260 ms
●Server Backend Latencies 590 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 490 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
48

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.home-project-cont-swiper > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
div > div.menus-view > div.menus-view_next > img div > div.menus-view > div.menus-view_next > img
div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > img.pre-img-lasy div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > img.pre-img-lasy

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > iframe div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > iframe
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > iframe div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > iframe

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right
div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right div.article-item-box > div.article-item > div.article-item-cont > a.artivle-item-right

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
搜索 div.toolbar-search > div.toolbar-search-container > button#toolbar-search-button > span
会员·新人礼包 div.toolbar-container-right > div.toolbar-btns > div.toolbar-btn > a
联系我们 div.layout-menus—footer > div.csdnside-copyright-footer > div.csdnside-copyright-footer-contact > div.work-time
工作时间: 8:30 - 22:00 div.layout-menus—footer > div.csdnside-copyright-footer > div.csdnside-copyright-footer-contact > div.work-time
客服电话: 400-660-0108 div.layout-menus—footer > div.csdnside-copyright-footer > div.csdnside-copyright-footer-contact > div.work-time
kefu@csdn.net div.csdnside-copyright-footer > div.csdnside-copyright-footer-contact > div.work-time-btn > a.link
在线客服 div.csdnside-copyright-footer > div.csdnside-copyright-footer-contact > div.work-time-btn > a.link
更多资讯 div#home-content-box > div.home-info > div.home-cont-title > p
更多开源项目 div#home-content-box > div.home-project > div.home-cont-title > a
排行榜 div#home-content-box > div.home-article > div.home-cont-title > a
不知道有没有和我当初一样的朋友，刚接触深度学习的时候，信心满满翻开《深度学习》花书，刚看了两章神经元，满页的偏导、矩阵乘法直接给我干懵了。合上书脑子里就一个想… div.article-item > div.article-item-cont > div.artivle-item-left > a.article-desc
阅读 2.1k div.article-bottom > div.operation-b > p.operation-b-img > span.num
60赞 div.article-bottom > div.operation-b > p.operation-b-img > span.num
收藏 60 div.article-bottom > div.operation-b > a.operation-b-img > span.num
Product Hunt 每日热榜 | 2026-04-11 通过消息API，将Opus作为顾问与Sonnet或Haiku作为执行者配对，为开发者创建人工智能… div.article-item > div.article-item-cont > div.artivle-item-left > a.article-desc
阅读 2.7k div.article-bottom > div.operation-b > p.operation-b-img > span.num
7赞 div.article-bottom > div.operation-b > p.operation-b-img > span.num
收藏 7 div.article-bottom > div.operation-b > a.operation-b-img > span.num
任务类型关键指标核心关注点分类任务准确率总体正确率（类别平衡时）精确率减少误报（FP）召回率减少漏报（FN）F1-Score精确率与召回率的平衡（类别不平衡时… div.article-item > div.article-item-cont > div.artivle-item-left > a.article-desc
阅读 2.2k div.article-bottom > div.operation-b > p.operation-b-img > span.num
18赞 div.article-bottom > div.operation-b > p.operation-b-img > span.num
收藏 15 div.article-bottom > div.operation-b > a.operation-b-img > span.num
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These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
全部 资讯 OpenClaw DeepSeek MCP 运维 操作系统 人工智能 Java C++ Python 数据结构与算法 前端… div > div.menus-view > div.menus-view_content > ul.menus-view_content—inner

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
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2026年4月，全球AI行业进入了一个密集的“信息释放期”。从OpenAI刷新商业史的融资纪录，到阿里千问登顶全球调用榜，再到Anthropic发布最新模型，… div.article-item > div.article-item-cont > div.artivle-item-left > a.article-desc
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选择NOR还是NAND，根本上是应用需求与技术特性需要存储并直接执行代码、对随机读取延迟敏感、容量要求不大（<1Gb）时，选择NOR Flash。需要海量数据… div.article-item > div.article-item-cont > div.artivle-item-left > a.article-desc
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●Form elements have associated labels
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`[aria-*]` attributes match their roles
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA attributes are used as specified for the element's role
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements use only permitted ARIA attributes
○`[role]`s have all required `[aria-*]` attributes
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○`[role]` values are valid
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○`[aria-*]` attributes have valid values
○`[aria-*]` attributes are valid and not misspelled
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230306070808940.jpg98 x 64 (1.53)1600 x 900 (1.78)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230209093821579.jpg98 x 64 (1.53)1366 x 768 (1.78)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230310014808316.jpg98 x 64 (1.53)1364 x 768 (1.78)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230306064258203.jpg98 x 64 (1.53)1280 x 800 (1.60)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230310013332272.jpg98 x 64 (1.53)1024 x 768 (1.33)
div.member-item > a > div.image > img div.member-item > a > div.image > img
img-bss.csdnimg.cn/20230209093835884.jpg98 x 64 (1.53)1120 x 632 (1.77)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)
div.article-item > div.article-item-cont > a.artivle-item-right > img div.article-item > div.article-item-cont > a.artivle-item-right > img
csdnimg.cn/release/cmsfe/public/img/lazyLogo2.1882d7f4.png128 x 84 (1.52)428 x 240 (1.78)

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
g.csdnimg.cn/tingyun/tingyun.js
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
85

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
立即登录 div.toolbar-btns > div.toolbar-btn > div#csdn-toolbar-profile-nologin > a.csdn-toolbar-loginbtn
body > div > div.csdn-side-toolbar > a.option-box body > div > div.csdn-side-toolbar > a.option-box

To appear in search results, crawlers need access to your app.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img a.layout-menu-item_inner > div.layout-menu-item_info > div.layout-menu-item_icon > img
div > div.menus-view > div.menus-view_next > img div > div.menus-view > div.menus-view_next > img
div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > img.pre-img-lasy div.ad_fullWidth > div.ad-wrap > div#kp_box_986 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_585 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_588 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_589 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_590 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_591 > img.pre-img-lasy
div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > img.pre-img-lasy div.el-carousel__item > div.carousel_item_iframe > div#kp_box_592 > img.pre-img-lasy

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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