Use os.availableParallelism() instead of os.cpus().length #5091
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dmichon-msft
requested review from
D4N14L,
TheLarkInn,
apostolisms,
iclanton and
octogonz
as code owners
D4N14L
approved these changes
Jan 30, 2025
D4N14L
approved these changes
Jan 30, 2025
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Summary
Prefer using
os.availableParallelism()toos.cpus().lengthThe former API was introduced in NodeJS 18 and performs a lot less work than the latter.
Details
In Node 22,
os.cpus()opens several files to read info about each CPU on every invocation.How it was tested
Build, since this API is used to determine parallelism of Rush, as well as various unit tests.
Impacted documentation
Only a few method comments where the default comes from this method.