Re: git gc --aggressive led to about 40 times slower "git log --raw"

2014-02-20 23:35 GMT+00:00 Duy Nguyen <pclouds@gmail.com>:

Just wondering: would it be difficult to fix the problems that lead to worse than linear slowdown with the --depth? (I.e. adaptive cache/hash table size.) If the performance difference between say --depth=25 and --depth=250 could be reduced from a factor 40 to 10 (or better if things are back to other things taking more time than the object access), that would seem like a nice gain in any case.

Also, in "man git-gc" document --aggressive that it leads to slower *read* performance after the gc, I remember having red that option's docs when I ran it, and since it didn't mention that it makes reads slower, I didn't expect it to, and thus didn't remember this as the source of the problem when I noticed that things were slow.

(But, I took from the discussion that increasing the gzip window size (?) would make things smaller anyway, so perhaps all that isn't even necessary?)

I can test next week if you have particular suggestions to test.

Christian.