Build Modes

Zig provides four build modes, with debug being the default as it produces the shortest compile times.

	Runtime Safety	Optimizations
Debug	Yes	No
ReleaseSafe	Yes	Yes, Speed
ReleaseSmall	No	Yes, Size
ReleaseFast	No	Yes, Speed

These may be used with zig run and zig test with the arguments -O ReleaseSafe, -O ReleaseSmall, and -O ReleaseFast.

Users are recommended to develop their software with runtime safety enabled, despite its small speed disadvantage.