Build: enable parallel source file compilation on MSVC

AcademySoftwareFoundation / OpenColorIO

A color management framework for visual effects and animation.

https://opencolorio.org

BSD 3-Clause "New" or "Revised" License

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Build: enable parallel source file compilation on MSVC #2072

Closed aras-p closed 1 month ago

aras-p commented 1 month ago

By default Visual Studio projects do not compile source files in parallel. Add "/MP" flag to enable that.

From scratch OCIO build on Ryzen 5950X, VS2022: 580sec -> 208sec. Most of remaining single-threaded time is cloning external libraries or building external libraries (most of them don't do parallel compilation either). But within building OCIO itself, CPU usage goes close to 100% instead of 5%.

linux-foundation-easycla[bot] commented 1 month ago

The committers listed above are authorized under a signed CLA.

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remia commented 1 month ago

We should probably have added this long ago... thanks @aras-p!