Jonathan Dieter (jdieter@xxxxxxxxx) said: > The second one has to do with the fact that when rebuilding the rpms, we > have to recompress the data, and xz compression is over 10x slower than > gzip. Stats of the day... I took an existing xz-compressed RPM, and built a newer release of that package with varying xz levels. The numbers are: - the new package size at that XZ compression level - the time to create a new deltarpm from a delta to that new version level 1 1416k real 0m0.935s user 0m0.893s sys 0m0.036s level 2 952k real 0m0.839s user 0m0.790s sys 0m0.048s level 3 848k real 0m2.762s user 0m2.702s sys 0m0.055s level 4 832k real 0m2.902s user 0m2.817s sys 0m0.084s level 5 824k real 0m3.269s user 0m3.131s sys 0m0.128s level 6 812k real 0m4.364s user 0m4.026s sys 0m0.164s level 7 (what we do now) 812k real 0m4.698s user 0m4.516s sys 0m0.176s So... just set the xz compression level to 2, let it be that way for future builds, and go about our business? Bill -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
