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+---
+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>