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This interface is deprecated in the Navigation Timing Level 2 specification . Please use the PerformanceNavigationTiming interface instead.

PerformanceTiming interface is a legacy interface kept for backwards compatibility and contains properties that offer performance timing information for various events which occur during the loading and use of the current page. You get a PerformanceTiming object describing your page using the window.performance.timing 特性。

特性

PerformanceTiming interface doesn't inherit any properties.

These properties each describe the time at which a particular point in the page loading process was reached. Some correspond to DOM events; others describe the time at which internal browser operations of interest took place.

Each time is provided as an unsigned long long representing the moment, in milliseconds since the UNIX epoch

These properties are listed in the order in which they occur during the navigation process.

PerformanceTiming.navigationStart 只读
When the prompt for unload terminates on the previous document in the same browsing context. If there is no previous document, this value will be the same as PerformanceTiming.fetchStart .
PerformanceTiming.unloadEventStart 只读
当 unload event has been thrown, indicating the time at which the previous document in the window began to unload. If there is no previous document, or if the previous document or one of the needed redirects is not of the same origin, the value returned is 0 .
PerformanceTiming.unloadEventEnd 只读
当 unload event handler finishes. If there is no previous document, or if the previous document, or one of the needed redirects, is not of the same origin, the value returned is 0 .
PerformanceTiming.redirectStart 只读
When the first HTTP redirect starts. If there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0 .
PerformanceTiming.redirectEnd 只读
When the last HTTP redirect is completed, that is when the last byte of the HTTP response has been received. If there is no redirect, or if one of the redirects is not of the same origin, the value returned is 0 .
PerformanceTiming.fetchStart 只读
When the browser is ready to fetch the document using an HTTP request. This moment is before the check to any application cache.
PerformanceTiming.domainLookupStart 只读
When the domain lookup starts. If a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as PerformanceTiming.fetchStart .
PerformanceTiming.domainLookupEnd 只读
When the domain lookup is finished. If a persistent connection is used, or the information is stored in a cache or a local resource, the value will be the same as PerformanceTiming.fetchStart .
PerformanceTiming.connectStart 只读
When the request to open a connection is sent to the network. If the transport layer reports an error and the connection establishment is started again, the last connection establishment start time is given. If a persistent connection is used, the value will be the same as PerformanceTiming.fetchStart .
PerformanceTiming.connectEnd 只读
When the connection is opened network. If the transport layer reports an error and the connection establishment is started again, the last connection establishment end time is given. If a persistent connection is used, the value will be the same as PerformanceTiming.fetchStart . A connection is considered as opened when all secure connection handshake, or SOCKS authentication, is terminated.
PerformanceTiming.secureConnectionStart 只读
When the secure connection handshake starts. If no such connection is requested, it returns 0 .
PerformanceTiming.requestStart 只读

When the browser sent the request to obtain the actual document, from the server or from a cache. If the transport layer fails after the start of the request and the connection is reopened, this property will be set to the time corresponding to the new request.

PerformanceTiming.responseStart 只读

When the browser received the first byte of the response, from the server from a cache, or from a local resource.

PerformanceTiming.responseEnd 只读

When the browser received the last byte of the response, or when the connection is closed if this happened first, from the server, the cache, or from a local resource.

PerformanceTiming.domLoading 只读
When the parser started its work, that is when its Document.readyState changes to 'loading' 和相应 readystatechange event is thrown.
PerformanceTiming.domInteractive 只读
When the parser finished its work on the main document, that is when its Document.readyState changes to 'interactive' 和相应 readystatechange event is thrown.
PerformanceTiming.domContentLoadedEventStart 只读
Right before the parser sent the DOMContentLoaded event, that is right after all the scripts that need to be executed right after parsing have been executed.
PerformanceTiming.domContentLoadedEventEnd 只读

Right after all the scripts that need to be executed as soon as possible, in order or not, have been executed.

PerformanceTiming.domComplete 只读
When the parser finished its work on the main document, that is when its Document.readyState changes to 'complete' 和相应 readystatechange event is thrown.
PerformanceTiming.loadEventStart 只读
当 load event was sent for the current document. If this event has not yet been sent, it returns 0.
PerformanceTiming.loadEventEnd 只读
当 load event handler terminated, that is when the load event is completed. If this event has not yet been sent, or is not yet completed, it returns 0.

方法

PerformanceTiming interface doesn't inherit any methods.

PerformanceTiming.toJSON()
返回 JSON object representing this PerformanceTiming 对象。

规范

规范 状态 注释
导航计时
The definition of 'PerformanceTiming' in that specification. 		推荐 初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据
桌面 移动
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
PerformanceTiming 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 8 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 8 Samsung Internet Android 1.0
connectEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
connectStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domainLookupEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domainLookupStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domComplete 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domContentLoadedEventEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 8 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 8 Samsung Internet Android 1.0
domContentLoadedEventStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domInteractive 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
domLoading 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
fetchStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
loadEventEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
loadEventStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
navigationStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari Yes WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS Yes Samsung Internet Android 1.0
redirectEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
redirectStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
requestStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
responseEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
responseStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
secureConnectionStart 弃用 Chrome 6 Edge 18 Firefox 56 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 56 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
toJSON 弃用 Chrome 44 Edge 12 Firefox 25 IE 9 Opera 32 Safari Yes WebView Android 44 Chrome Android 44 Firefox Android 25 Opera Android 32 Safari iOS Yes Samsung Internet Android 4.0
unloadEventEnd 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0
unloadEventStart 弃用 Chrome 6 Edge 12 Firefox 7 IE 9 Opera 15 Safari 11 WebView Android Yes Chrome Android 18 Firefox Android 7 Opera Android 14 Safari iOS 11 Samsung Internet Android 1.0

图例

完整支持

完整支持

弃用。不要用于新网站。

弃用。不要用于新网站。

另请参阅

元数据

  • 最后修改：
  1. 导航计时 API
  2. PerformanceTiming
  3. 特性
    1. connectEnd
    2. connectStart
    3. domainLookupEnd
    4. domainLookupStart
    5. domComplete
    6. domContentLoadedEventEnd
    7. domContentLoadedEventStart
    8. domInteractive
    9. domLoading
    10. fetchStart
    11. loadEventEnd
    12. loadEventStart
    13. navigationStart
    14. redirectEnd
    15. redirectStart
    16. requestStart
    17. responseEnd
    18. responseStart
    19. secureConnectionStart
    20. unloadEventEnd
    21. unloadEventStart
  4. Related pages for Navigation Timing
    1. 性能
    2. PerformanceNavigation
    3. PerformanceNavigationTiming
    4. Window.performance