在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

setResourceTimingBufferSize() method sets the browser's resource timing buffer size to the specified number of " resource " performance entry type 对象。

A browser's recommended resource timing buffer size is at least 150 performance entry 对象。

注意： 此特征可用于 Web 工作者 .

句法

performance.setResourceTimingBufferSize(maxSize);
					

自变量

maxSize

A 编号 representing the maximum number of performance entry objects the browser should hold in its performance entry buffer.

返回值

none

This method has no return value.

范例

function setResourceTimingBufferSize(maxSize) {
  if (performance === undefined) {
    log("Browser does not support Web Performance");
    return;
  }
  var supported = typeof performance.setResourceTimingBufferSize == "function";
  if (supported) {
    log("... Performance.setResourceTimingBufferSize() = Yes");
    performance.setResourceTimingBufferSize(maxSize);
  } else {
    log("... Performance.setResourceTimingBufferSize() = NOT supported");
  }
}
					

规范

规范	状态	注释
Resource Timing Level 1 The definition of 'setResourceTimingBufferSize()' in that specification.	候选推荐	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
setResourceTimingBufferSize	Chrome 46 46 22 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari 11	WebView Android 46 46 ? — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android 46 46 25 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android Yes	Opera Android Yes	Safari iOS 不支持 No	Samsung Internet Android 5.0 5.0 1.5 — 7.0 Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持

完整支持

不支持

不支持

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

元数据

• 最后修改： Apr 4, 2019

相关话题

1. 资源计时 API
2. 性能
3. 特性

   1. navigation
   2. onresourcetimingbufferfull
   3. timeOrigin
   4. timing
4. 方法

   1. clearMarks()
   2. clearMeasures()
   3. clearResourceTimings()
   4. getEntries()
   5. getEntriesByName()
   6. getEntriesByType()
   7. mark()
   8. measure()
   9. now()
   10. setResourceTimingBufferSize()
   11. toJSON()
5. 事件

   1. resourcetimingbufferfull
6. Related pages for Resource Timing API

   1. PerformanceEntry
   2. PerformanceResourceTiming
   3. Window.performance