Remove hyperthreading multiplier to improve performance. Tests on my local machine show that the Hyperthreading multiplier is significantly hurting our builds times. Running with 8 logical cores is 11% faster than running with 4.8 cores when doing builds on my Mac. macOS 10.12 MacBookPro 2017 (1 CPU, 4 core, 8 hyperthreaded) 1434.259 with --jobs = 5 1274.459 with --jobs = 8 I'll do some similar tests on Linux to see if it makes sense there. PiperOrigin-RevId: 178654477
{Fast, Correct} - Choose two
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