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# targetTimestamp

A deadline that indicates when your app needs to finish rendering to the drawable.

```
var targetTimestamp: CFTimeInterval { get }
```

## Discussion

Your app needs to call the [`drawable`](/documentation/QuartzCore/CAMetalDisplayLink/Update/drawable) instance’s <doc://com.apple.documentation/documentation/Metal/MTLDrawable/present()> method before the deadline. GPU rendering can continue after this time, based on [`preferredFrameLatency`](/documentation/QuartzCore/CAMetalDisplayLink/preferredFrameLatency). For more information on timing your app’s rendering, see [`metalDisplayLink(_:needsUpdate:)`](/documentation/QuartzCore/CAMetalDisplayLinkDelegate/metalDisplayLink(_:needsUpdate:)).

---

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