鍓嶇鎬ц兘鐩戞帶

Posted 2020-08-07

鏍囩锛?/p>

鍓嶇鎬ц兘

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  firstPaintTime: 1422412258.085214,
  navigationType: "Reload",
  npnNegotiatedProtocol: "unknown",
  requestTime: 0,
  startLoadTime: 1422412256.920803,
  wasAlternateProtocolAvailable: false,
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  wasNpnNegotiated: false
}

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銆€銆€鏍峰紡琛紙Style sheets锛?/span>

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銆€銆€寮€濮嬫覆鏌撴椂闂达細

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navigationStart: 1441112691935,
 
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redirectStart: 0,
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銆€銆€IE8 绛変綆鐗堟湰娴忚鍣?閫氳繃 cookie 璁板綍鏃堕棿鎴崇殑鏂瑰紡鏉ョ粺璁★紝闇€瑕佹敞鎰忕殑鏄?Cookie 鏂瑰紡鍙兘缁熻鍒扮珯鍐呰烦杞殑鏁版嵁銆?棣栨杩涘叆娌℃湁濂界殑缁熻鏂规硶銆?/p>

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銆€銆€澶撮儴璧勬簮鍔犺浇鏃堕棿锛?/strong> 

<!DOCTYPE HTML>
<html>
    <head>
        <meta charset="UTF-8"/>
    <script>
      var start_time = +new Date; //娴嬭瘯鏃堕棿璧风偣锛屽疄闄呯粺璁¤捣鐐逛负 DNS 鏌ヨ
    </script>
    <!-- 3s 鍚庤繖涓?js 鎵嶄細杩斿洖 -->
    <script src="script.php"></script>  
    <script>
      var end_time = +new Date; //鏃堕棿缁堢偣
      var headtime = end_time - start_time; //澶撮儴璧勬簮鍔犺浇鏃堕棿    
      console.log(headtime);
    </script>
    </head> 
    <body>     
    <p>鍦ㄥご閮ㄨ祫婧愬姞杞藉畬涔嬪墠椤甸潰灏嗘槸鐧藉睆</p>
    <p>script.php 琚ā鎷熻缃?3s 鍚庤繑鍥烇紝head 搴曢儴鍐呭祵 JS 绛夊緟鍓嶉潰 js 杩斿洖鍚庢墠鎵ц</p>
    <p>script.php 鏇挎崲鎴愪竴涓墽琛岄暱鏃堕棿寰幆鐨?js 鏁堟灉涔熶竴鏍?span style="color: #0000ff;"></p>  
    </body>
</html>

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var firstPaintTime = end_time - performance.timing.navigationStart

  

 2.2棣栧睆鏃堕棿

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銆€銆€棣栧睆浣嶇疆璋冪敤 API 寮€濮嬬粺璁?-> 缁戝畾棣栧睆鍐呮墍鏈夊浘鐗囩殑 load 浜嬩欢 -> 椤甸潰鍔犺浇瀹屽悗鍒ゆ柇鍥剧墖鏄惁鍦ㄩ灞忓唴锛屾壘鍑哄姞杞芥渶鎱㈢殑涓€寮?-> 棣栧睆鏃堕棿

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• css 閲嶈鑳屾櫙鍥剧墖鍙互閫氳繃 JS 璇锋眰鍥剧墖 url 鏉ョ粺璁?娴忚鍣ㄤ笉浼氶噸澶嶅姞杞?
• 娌℃湁鍥剧墖鍒欎互缁熻 JS 鎵ц鏃堕棿涓洪灞忥紝鍗宠涓烘枃瀛楀嚭鐜版椂闂?/li>

//IE gif閲嶅onload瑙ｅ喅
var img=new Image(); 
img.load=function(){ 
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        <div>杩欐槸绗竴灞忥紝杩欐槸绗竴灞?lt;/div>
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2.4鎬讳笅杞芥椂闂?/strong>

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2.5缁熻api鐩稿叧

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• High Resolution Timing锛堥珮绮惧害璁℃椂锛?/li>

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// console output 439985.4570000316

• Page Visibility 锛堥〉闈㈠彲瑙佹€э級

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褰撻〉闈㈣幏寰楁垨澶卞幓鐒︾偣鏃讹紝鏂囨。瀵硅薄鐨剉isibilitychange浜嬩欢渚夸細琚Е鍙戙€?/p>

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鍏跺畠閮ㄥ垎API鍔熻兘绠€浠?/h4>

• Resource Timing锛堣祫婧愯鏃讹級——瀵瑰崟涓祫婧愶紙濡傚浘鐗囷級鐨勮鏃讹紝鍙互瀵圭粏绮掑害鐨勭敤鎴蜂綋楠岃繘琛屾娴嬨€?/li>
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• Battery Status锛堢數姹犵姸鎬侊級——鑳藉妫€娴嬪綋鍓嶈澶囩殑鐢垫睜鐘舵€侊紝渚嬪鏄惁姝ｅ湪鍏呯數銆佺數閲忕瓑绾х瓑绛夈€傚彲浠ユ牴鎹綋鍓嶇數閲忓喅瀹氭槸鍚︽樉绀烘煇浜涘唴瀹癸紙渚嬪瑙嗛銆佸姩鐢荤瓑绛夛級锛屽浜庣Щ鍔ㄨ澶囨潵璇撮潪甯稿疄鐢ㄣ€?/li>
• User Timing锛堢敤鎴疯鏃讹級——鍙互瀵规煇娈典唬鐮併€佸嚱鏁拌繘琛岃嚜瀹氫箟璁℃椂锛屼互浜嗚В杩欐浠ｇ爜鐨勫叿浣撹繍琛屾椂闂达紝绫讳技浜巗top watch鐨勪綔鐢ㄣ€?/li>
• Beacon锛堢伅濉旓級——鍙互灏嗗垎鏋愮粨鏋滄垨璇婃柇浠ｇ爜鍙戦€佺粰鏈嶅姟鍣紝瀹冮噰鐢ㄤ簡寮傛鎵ц鐨勬柟寮忥紝鍥犳涓嶄細褰卞搷椤甸潰涓叾瀹冧唬鐮佺殑杩愯銆傚浜庢敹闆嗘祴璇曠粨鏋滃苟杩涜缁熻鍒嗘瀽鏉ヨ鏄竴绉嶅崄鍒嗕究鍒╃殑宸ュ叿銆?/li>
• Animation Timing锛堝姩鐢昏鏃讹級 - 閫氳繃requestAnimationFrame鍑芥暟璁╂祻瑙堝櫒绮鹃€氬湴鎺у埗鍔ㄧ敾鐨勫抚鏁帮紝鑳藉鏈夋晥鍦伴厤鍚堟樉绀哄櫒鐨勫埛鏂扮巼锛屾彁渚涙洿骞虫粦鐨勫姩鐢绘晥鏋滐紝鍑忓皯瀵笴PU鍜岀數姹犵殑娑堣€椼€?/li>
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• Navigation Error Logging锛堝鑸敊璇棩蹇楄褰曪級——閫氳繃涓€涓帴鍙ｅ瓨鍌ㄥ強鑾峰彇涓庢煇涓枃妗ｇ殑瀵艰埅鐩稿叧鐨勯敊璇褰曘€傝鏍囧噯鐩墠灏氭湭琚敮鎸併€?/li>

 

娴忚鍣ㄦ敮鎸?/strong>

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瑙勮寖	Internet Explorer	Firefox	Chrome	Safari	Opera	ios Safari	android
Navigation Timing	9	31	鍏ㄩ儴	8	26	8 (涓嶅寘鎷?8.1)	4.1
High Resolution Timing	10	31	鍏ㄩ儴	8	26	8 (涓嶅寘鎷?8.1)	4.4
Page Visibility	10	31	鍏ㄩ儴	7	26	7.1	4.4
Resource Timing	10	34	鍏ㄩ儴	-	26	-	4.4
Battery Status*	-	31 锛堥儴鍒嗘敮鎸侊級	38	-	26	-	-
User Timing	10	-	鍏ㄩ儴	-	26	-	4.4
Beacon	-	31	39	-	26	-	-
Animation Timing	10	31	鍏ㄩ儴	6.1	26	7.1	4.4
Resource Hints	-	-	浠呴檺Canary鐗?/td>	-	-	-	-
Frame Timing	-	-	-	-	-	-	-
Navigation Error Logging	-	-	-	-	-	-	-
WebP*	-	-	鍏ㄩ儴	-	26	-	4.1
Picture element and srcset attribute *	-	-	38	-	26	-	-

鍏跺畠

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2.6 鎬ц兘浼樺寲鍒嗕负涓や釜闃舵鏉ュ仛

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