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MSBuild invokes cl.exe with /MP (set in common.gypi), making it
compile sources in parallel using a number of internal processes
equal to the number of effective processors. MSBuild /m uses a
similar mechanism, so the number of compiler processes can grow to
the number of effective processors squared.
This limits MSBuild to 2 processes, to still use some parallelization
while requiring less memory. Cl.exe is still invoked with /MP, thus
the maximum number of processes is limited to twice the number of
effective processors.
PR-URL: #12184
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
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