Increase default [python-setup].resolver_jobs to cpu_count / 2 (Cherry-pick of #11006)
#11011
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…antsbuild#11006) This option controls the concurrency of each Pex subprocess. We had set the default low to 2 because—before we added the single resolve optimization—it was common to build multiple PEXes at the same time. This resulted in exhaustion / an OOM issue for Toolchain, which was tricky to figure out. Now, the user normally builds no more than 1-3 PEXes at a time, unless running `./pants package ::` or does not use a constraints file so we can't use a single resolve. So, our default is missing out on performance. PEX's normal default is `cpu_count`. Instead, we use `cpu_count / 2` to try to balance performance vs. safety. [ci skip-rust] [ci skip-build-wheels]
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Cherry-pick with no modifications. |
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[ci skip-rust]
[ci skip-build-wheels]