---
title: PlaygroundPage.ExecutionMode.runFastest
framework: playgroundsupport
role: symbol
role_heading: Enumeration Case
path: playgroundsupport/playgroundpage/executionmode/runfastest
---

# PlaygroundPage.ExecutionMode.runFastest

An execution mode that runs at the fastest possible speed.

## Declaration

```swift
case runFastest
```

## See Also

### Controlling Execution Speed

- [PlaygroundPage.ExecutionMode.run](playgroundsupport/playgroundpage/executionmode/run.md)
- [PlaygroundPage.ExecutionMode.runFaster](playgroundsupport/playgroundpage/executionmode/runfaster.md)