CI - Build with more than 2 threads

[spencer-lunarg]

I noticed in https://github.com/KhronosGroup/SPIRV-LLVM-Translator/blob/main/.github/workflows/check-in-tree-build.yml#L122

it has make llvm-spirv -j2

why is this only 2?

I was looking into how the various KhronosGroup repos are using our limited, shared Github CI minutes, the SPIRV-LLVM-Translator repo is among the most but understand it is a constantly and large contributed repo

I see the CI jobs take about 55 minutes, 50 of which are just building it, looking at the Linux build, I noticed it was only using 2 threads and should just use ninja or make llvm-spirv -j$(nproc)

Thanks

[spencer-lunarg]

I noticed this with cmake --build . --config Release --target llvm-spirv -j2 on Windows build... also on the MacOS build

I will mention, the CI minutes are billed at

• 1x Linux runner
• 2x Windows runner
• 10x MacOS runner

which is where a lot of the minute "cost" comes from

[svenvh]

Thanks for spotting this! We seem to have been using -j2 for a long time (predating GitHub Actions), for no particular reason that I could see. I've opened #3483 to see if the suggested changes work.