---
title: Performance.memory
slug: Web/API/Performance/memory
translation_of: Web/API/Performance/memory
original_slug: Web/API/Performance/内存
---
<p>{{APIRef}}</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><em>timingInfo</em> = <em>performance</em>.memory</pre>

<h2 id="属性">属性</h2>

<dl>
 <dt><code>jsHeapSizeLimit</code></dt>
 <dd>上下文内可用堆的最大体积，以字节计算。</dd>
 <dt><code>totalJSHeapSize</code></dt>
 <dd> 已分配的堆体积，以字节计算。</dd>
</dl>

<dl>
 <dt><code>usedJSHeapSize</code></dt>
 <dd>当前 JS 堆活跃段（segment）的体积，以字节计算。</dd>
</dl>

<h2 id="规范">规范</h2>

<p>无。</p>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<div>


<p>{{Compat("api.Performance.memory")}}</p>
</div>

<h2 id="查看更多">查看更多</h2>

<ul>
 <li>属于 {{domxref("Performance")}} 接口。</li>
</ul>