---
title: MTLLibraryOptimizationLevel.default
framework: metal
role: symbol
role_heading: Case
path: metal/mtllibraryoptimizationlevel/default
---

# MTLLibraryOptimizationLevel.default

An optimization option for the Metal compiler that prioritizes runtime performance.

## Declaration

```swift
case `default`
```

## See Also

### Optimization options

- [MTLLibraryOptimizationLevel.size](metal/mtllibraryoptimizationlevel/size.md)