> Dne 30. 05. 19 v 14:57 Kevin Kofler napsal(a): > > Jason L Tibbitts III wrote: > > > >>>>>>> "BC" == Ben Cotton <bcotton@xxxxxxxxxx> writes: > >> BC> * The recommended compression level is 19. The builds will take > >> BC> longer, but the additional compression time is negligible in the > >> BC> total build time and it pays off in better compression ratio than xz > >> BC> lvl2 has. > >> > >> That seems different than other results I've seen. According to the > >> wikipedia page (https://en.wikipedia.org/wiki/Zstandard) and the > >> references therein, Ubuntu found that zstd level 19 was faster but with > >> poorer compression when compared with xz level 2 (which is the same > >> level that we use now). > I haven't recompiled all Fedora, hoping that the package set I used > (Livecd RPMs) is a good sample. Thanks for pointing this out. > > > > > If the smallest size is the goal, wouldn't it be worth trying to just use a > > higher xz level instead? > That would increase the compression ratio, but I don't know the impact > on compression and decompression times and also required memory for both > operations. > On modern system with NVMEs, CPU seems to be the bottleneck and it might > get worse if we increase xz compression level. What about constrained systems where there's limited CPU, that could be a container or a low end cloud instance without any guarantee of resources or a Raspberry Pi. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
