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1. This should speed up decompression for folks, as parallel xz creates a different archive which can be decompressed in parallel. Note that this different method is enabled by default in a new xz release coming shortly anyway (>= 5.3.3_alpha1). I build GCC regularly from the weekly snapshots and so the decompression time adds up. 2. It should speed up compression on the webserver a bit. Note that -T0 won't be the default in the new xz release, only the parallel compression mode (which enables parallel decompression). -T0 detects the number of cores available. So, if a different number of threads is preferred, it's fine to set e.g. -T2, etc. Signed-off-by: Sam James <sam@gentoo.org> * gcc_release (XZ): Add -T0.
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