Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The writeTimestamp() method of the GPUCommandEncoder interface encodes a command that writes a timestamp into a GPUQuerySet once the previous commands recorded into the same queued GPUCommandBuffer have been executed by the GPU.
js
writeTimestamp(querySet, queryIndex)
querySet
A GPUQuerySet object representing the query set that will store the timestamp values.
queryIndex
A number representing the index of the query in the query set.
None (Undefined).
The following criteria must be met when calling writeTimestamp(), otherwise a GPUValidationError is generated and the GPUCommandEncoder becomes invalid:
timestamp-query feature is enabled in the GPUDevice.querySet GPUQuerySet.type is "timestamp"queryIndex value is less than the GPUQuerySet.count.js
// ...
const querySet = device.createQuerySet({
type: "timestamp",
count: 32,
});
// ...
commandEncoder.writeTimestamp(querySet, 0);
// ...
| Specification |
|---|
| WebGPU # dom-gpucommandencoder-writetimestamp |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
writeTimestamp |
113Currently supported on ChromeOS, macOS, and Windows only. |
113Currently supported on ChromeOS, macOS, and Windows only. |
previewCurrently supported on Linux and Windows only. |
No |
99Currently supported on ChromeOS, macOS, and Windows only. |
No | No | No | No | No | No | No |
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https://developer.mozilla.org/en-US/docs/Web/API/GPUCommandEncoder/writeTimestamp