---
title: fastMathEnabled
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlcompileoptions/fastmathenabled
---

# fastMathEnabled

A Boolean value that indicates whether the compiler can perform optimizations for floating-point arithmetic that may violate the IEEE 754 standard.

## Declaration

```swift
var fastMathEnabled: Bool { get set }
```

## Discussion

Discussion The default value is true. A true value also enables the high-precision variant of math functions for single-precision floating-point scalar and vector types.

## See Also

### Related Documentation

- [Metal Shading Language Guide](apple-archive/documentation/Metal/Reference/MetalShadingLanguageGuide/Introduction.md)
- [Metal Programming Guide](apple-archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Introduction.md)

### Configuring the compiler options

- [enableLogging](metal/mtlcompileoptions/enablelogging.md)
- [mathMode](metal/mtlcompileoptions/mathmode.md)
- [mathFloatingPointFunctions](metal/mtlcompileoptions/mathfloatingpointfunctions.md)
- [preserveInvariance](metal/mtlcompileoptions/preserveinvariance.md)
- [languageVersion](metal/mtlcompileoptions/languageversion.md)
- [preprocessorMacros](metal/mtlcompileoptions/preprocessormacros.md)
- [optimizationLevel](metal/mtlcompileoptions/optimizationlevel.md)
- [libraries](metal/mtlcompileoptions/libraries.md)