On Tue, 2022-11-08 at 07:14 +0000, Sam James via Gcc-patches wrote: > 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.
I'm wondering if running xz -T0 on different machines (with different core numbers) may produce different compressed data. The difference can cause trouble distributing checksums. -- Xi Ruoyao <xry...@xry111.site> School of Aerospace Science and Technology, Xidian University
