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git://git.yoctoproject.org/poky.git
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697eeef71b
TL;DR version:
with this, and the previous compression level changes
I am seeing drastic speedups in package_write_rpm completion times:
webkitgtk goes from 78 seconds to 37 seconds
glibc-locale goes from 399 seconds to 58 seconds (!)
The long version:
rpm uses multithreading for two purposes:
- spawning compressors (which are nowadays themselves
multi-threaded, so the feature is not as useful as it once
was)
- parallel file classification
While the former behaves well on massively parallel CPUs
(it was written and verified here :), the latter was then added
by upstream and only benchmarked on their very old, slow laptop,
apparently:
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