---
title: predictTiming()
framework: compositorservices
role: symbol
role_heading: Instance Method
path: compositorservices/layerrenderer/frame/predicttiming()
---

# predictTiming()

Computes and returns the predicted timing information for the frame.

## Declaration

```swift
func predictTiming() -> LayerRenderer.Frame.Timing?
```

## Mentioned in

Drawing fully immersive content using Metal

## Return Value

Return Value The predicted timing information for the specified frame, or nil if the layer is in the Layer.State.paused or Layer.State.invalidated state.

## Discussion

Discussion The returned timing information contains the frame-related deadlines to meet during the rendering process. For example, wait until the time in optimalInputTime to start the submission phase of your frame update. This function updates the frame-specific timing information with the latest data from Compositor Services before it returns it. Don’t call this function after you call queryDrawable() for the specified frame. After you retrieve the frame’s LayerRenderer.Drawable type, get the timing information from the drawable’s frameTiming property instead.

## See Also

### Getting timing information

- [LayerRenderer.Frame.Timing](compositorservices/layerrenderer/frame/timing.md)