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	<title>WebGLTimestampQueryPool - Three.js Docs</title>
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		<p class="inheritance" translate="no"><a href="TimestampQueryPool.html">TimestampQueryPool</a> → </p>
	<h1 translate="no">WebGLTimestampQueryPool</h1>
		<section>
			<header>
				<div class="class-description"><p>Manages a pool of WebGL timestamp queries for performance measurement.
Handles creation, execution, and resolution of timer queries using WebGL extensions.</p></div>
			</header>
			<article>
				<div class="container-overview">
					<h2>Constructor</h2>
					<h3 class="name name-method" id="WebGLTimestampQueryPool" translate="no">new <a href="#WebGLTimestampQueryPool">WebGLTimestampQueryPool</a><span class="signature">( gl : <span class="param-type">WebGLRenderingContext | WebGL2RenderingContext</span>, type : <span class="param-type">string</span>, maxQueries : <span class="param-type">number</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Creates a new WebGL timestamp query pool.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>gl</code></td>
									<td class="description last"><p>The WebGL context.</p></td>
								</tr>
								<tr>
									<td class="name"><code>type</code></td>
									<td class="description last"><p>The type identifier for this query pool.</p></td>
								</tr>
								<tr>
									<td class="name"><code>maxQueries</code></td>
									<td class="description last"><p>Maximum number of queries this pool can hold.<br/>Default is <code>2048</code>.</p></td>
								</tr>
							</tbody>
						</table>
					</div>
				</div>
				<h2 class="subsection-title">Methods</h2>
					<h3 class="name name-method" id="allocateQueriesForContext" translate="no">.<a href="#allocateQueriesForContext">allocateQueriesForContext</a><span class="signature">( uid : <span class="param-type">string</span> )</span><span class="type-signature"> : number</span> </h3>
					<div class="method">
						<div class="description">
							<p>Allocates a pair of queries for a given render context.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>uid</code></td>
									<td class="description last"><p>A unique identifier for the render context.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-overrides"><strong>Overrides:</strong> <a href="TimestampQueryPool.html#allocateQueriesForContext">TimestampQueryPool#allocateQueriesForContext</a></dt>
						</dl>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> The base offset for the allocated queries, or null if allocation failed.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="beginQuery" translate="no">.<a href="#beginQuery">beginQuery</a><span class="signature">( uid : <span class="param-type">string</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Begins a timestamp query for the specified render context.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>uid</code></td>
									<td class="description last"><p>A unique identifier for the render context.</p></td>
								</tr>
							</tbody>
						</table>
					</div>
					<h3 class="name name-method" id="dispose" translate="no">.<a href="#dispose">dispose</a><span class="signature">()</span> </h3>
					<div class="method">
						<div class="description">
							<p>Releases all resources held by this query pool.
This includes deleting all query objects and clearing internal state.</p>
						</div>
						<dl class="details">
							<dt class="tag-overrides"><strong>Overrides:</strong> <a href="TimestampQueryPool.html#dispose">TimestampQueryPool#dispose</a></dt>
						</dl>
					</div>
					<h3 class="name name-method" id="endQuery" translate="no">.<a href="#endQuery">endQuery</a><span class="signature">( uid : <span class="param-type">string</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Ends the active timestamp query for the specified render context.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>uid</code></td>
									<td class="description last"><p>A unique identifier for the render context.</p></td>
								</tr>
							</tbody>
						</table>
					</div>
					<h3 class="name name-method" id="resolveQueriesAsync" translate="no">.<a href="#resolveQueriesAsync">resolveQueriesAsync</a><span class="signature">()</span><span class="type-signature"> : Promise.&lt;number></span> <span class="type-signature">(async) </span></h3>
					<div class="method">
						<div class="description">
							<p>Asynchronously resolves all completed queries and returns the total duration.</p>
						</div>
						<dl class="details">
							<dt class="tag-overrides"><strong>Overrides:</strong> <a href="TimestampQueryPool.html#resolveQueriesAsync">TimestampQueryPool#resolveQueriesAsync</a></dt>
						</dl>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> The total duration in milliseconds, or the last valid value if resolution fails.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="resolveQuery" translate="no">.<a href="#resolveQuery">resolveQuery</a><span class="signature">( query : <span class="param-type">WebGLQuery</span> )</span><span class="type-signature"> : Promise.&lt;number></span> <span class="type-signature">(async) </span></h3>
					<div class="method">
						<div class="description">
							<p>Resolves a single query, checking for completion and disjoint operation.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>query</code></td>
									<td class="description last"><p>The query object to resolve.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> The elapsed time in milliseconds.</dt>
						</dl>
					</div>
				<h2 class="subsection-title">Source</h2>
				<p>
					<a href="https://github.com/mrdoob/three.js/blob/master/src/renderers/webgl-fallback/utils/WebGLTimestampQueryPool.js" target="_blank" rel="noopener" translate="no">src/renderers/webgl-fallback/utils/WebGLTimestampQueryPool.js</a>
				</p>
			</article>
		</section>
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