Where is the discussion happening? I ran the same benchmarks for my i7-6770HQ 4-core system. This really needs revising.
While disk space using in /boot is a concern, in this example at least -10 would use only 8MB (10%) more space and cut the time taken from 2m1s to 13s. zstd.0 84M 0m2.150s zstd.1 96M 0m1.236s zstd.2 90M 0m1.350s zstd.3 84M 0m2.235s zstd.4 84M 0m3.355s zstd.5 81M 0m5.679s zstd.6 81M 0m7.416s zstd.7 78M 0m8.857s zstd.8 77M 0m10.134s zstd.9 77M 0m11.238s zstd.10 72M 0m13.232s zstd.11 72M 0m14.897s zstd.12 72M 0m19.343s zstd.13 72M 0m26.327s zstd.14 72M 0m30.948s zstd.15 72M 0m40.913s zstd.16 70M 0m59.517s zstd.17 66M 1m15.854s zstd.18 64M 1m36.227s zstd.19 64M 2m1.417s -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/1958148 Title: mkinitramfs is too slow Status in initramfs-tools package in Ubuntu: In Progress Bug description: On the Nezha board creating an initrd takes more than 1 hour. The compression level -19 for zstd is unwisely chosen. Here are durations and compression results for an SiFive Unmatched board with four cores using zstd: -T0 -1 => 13.92s, 136298155 bytes -T0 -2 => 15.73s, 131717830 bytes -T0 -3 => 26.11s, 127434653 bytes -T0 -4 => 29.31s, 126924540 bytes -T0 -5 => 36.44s, 125296557 bytes -T0 -6 => 39.36s, 124781669 bytes -T0 -7 => 46.56s, 116200665 bytes -T0 -8 => 51.95s, 113172941 bytes -T0 -9 => 55.89s, 112835937 bytes -T0 -10 => 61.32s, 108326876 bytes -T0 -11 => 64.32s, 108115060 bytes -T0 -12 => 76.37s, 108016478 bytes -T0 -13 => 148.99s, 109121308 bytes -T0 -14 => 156.58s, 108908574 bytes -T0 -15 => 228.64s, 109213554 bytes -T0 -16 => 380.26s, 107260643 bytes -T0 -17 => 453.36s, 103679714 bytes -T0 -18 => 714.79s, 100402249 bytes -T0 -19 => 1046.58s, 100188713 bytes Compression level between -2 to -10 offer a good compromise between CPU time and compression results. Ideally there would be a parameter that we could pass to mkinitfs. But for as fast solution we should simply replace -19 by -9 in mkinitramfs. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1958148/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
