SCons: Default num_jobs to max CPUs minus 1 if not specified
#788
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akien-mga
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enhancement
This doesn't change the behavior when `--jobs`/`-j` is specified as a command-line argument or in `SCONSFLAGS`. The SCons hack used to know if `num_jobs` was set by the user is derived from the MongoDB setup. We use `os.cpu_count()` for portability (available since Python 3.4). With 4 CPUs or less, we use the max. With more than 4 we use max - 1 to preserve some bandwidth for the user's other programs.
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bruvzg
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Jul 17, 2022
Actually I had missed |
|
Cherry-picked for 3.5. |
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This doesn't change the behavior when
--jobs/-jis specified as acommand-line argument or in
SCONSFLAGS.The SCons hack used to know if
num_jobswas set by the user is derivedfrom the MongoDB setup.
We use
os.cpu_count()for portability (available since Python 3.4).With 4 CPUs or less, we use the max. With more than 4 we use max - 1 to
preserve some bandwidth for the user's other programs.
Equivalent to upstream Godot godotengine/godot#63087.
Should speed up macOS builds by using 3 cores by default (and dehardcodes
-j4in the Makefile).