Linus Torvalds wrote: > > On Fri, 11 Jan 2008, Sam Vilain wrote: >> Without compression of deltas: >> >> wilber:~/src/perl-preview$ du -sk .git/objects/pack/ >> 86781 .git/objects/pack/ >> >> With compression of deltas: >> >> wilber:~/src/perl-preview$ du -sk .git/objects/pack/ >> 72907 .git/objects/pack/ > > Ok, so non-compressed deltas are 20% bigger. > > That may well be a perfectly acceptable trade-off if the end result is > then a lot faster. Has somebody done performance numbers? I may have > missed them.. The best test is probably something like "git blame" on a > file that takes an appreciable amount of time. The difference seems only barely measurable; wilber:~/src/perl-preview$ time git annotate sv.c >/dev/null real 0m8.130s user 0m6.712s sys 0m1.412s wilber:~/src/perl-preview-loose$ time git annotate sv.c >/dev/null real 0m7.930s user 0m6.480s sys 0m1.408s (each one is last of three runs - dual-core x86_64 @ 2.1GHz w/512KB cache) sv.c has about 1500 revisions, though the oldest line is I also tried annotate and log on the YACC generated parser which only has about 165 revisions, with similar results - a very minor difference or no difference. Sam - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
