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getdeps: use half as many jobs by default on windows

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Summary:
This takes some pressure off both cpu and memory
on a laptop.

Reviewed By: pkaush

Differential Revision: D20562474

fbshipit-source-id: a058c71c47f25c3a2b3c1e34a0d0caf83e642021
This commit is contained in:
Wez Furlong
2020-03-26 06:54:07 -07:00
committed by Facebook GitHub Bot
parent d61c5c4816
commit 10e147d53c
1 changed files with 8 additions and 0 deletions
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8
build/fbcode_builder/getdeps/buildopts.py
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@@ -83,6 +83,14 @@ class BuildOptions(object):
import multiprocessing
num_jobs = multiprocessing.cpu_count()
if is_windows():
# On Windows the cpu count tends to be the HT count.
# Running with that level of concurrency tends to
# swamp the system and make hard to perform other
# light work. Let's halve the number of cores here
# to win that back. The user can still specify a
# larger number if desired.
num_jobs = int(num_jobs / 2)
if not install_dir:
install_dir = os.path.join(scratch_dir, "installed")