---
title: speed
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnaction/speed
---

# speed

A speed factor that modifies how fast an action runs.

## Declaration

```swift
var speed: CGFloat { get set }
```

## Discussion

Discussion The speed factor adjusts how fast an action’s animation runs. For example, a speed factor of 2.0 means the animation runs twice as fast.

## See Also

### Adjusting an Action’s Animation Properties

- [duration](scenekit/scnaction/duration.md)
- [timingMode](scenekit/scnaction/timingmode.md)
- [timingFunction](scenekit/scnaction/timingfunction.md)