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# How to improve the Swift project build time?
- URL: https://developerinsider.co/how-to-improve-the-swift-project-build-time/
- Published: 2020-05-31T04:37:44.000Z
- Updated: 2020-12-05T11:13:07.000Z
- Author: Vineet Choudhary
- Tags: Tips, Xcode, iOS, Swift

The Xcode 9.2 release notes mentioned an experimental feature that may improve Swift build times, enabled with the "BuildSystemScheduleInherentlyParallelCommandsExclusively" user default.

```sh
defaults write com.apple.dt.Xcode BuildSystemScheduleInherentlyParallelCommandsExclusively -bool NO

```

**Note**: According to the release notes it's an experimental feature which can "increase memory use during the build"