On Sat, 2 Dec 2006, Shawn Pearce wrote: > > With the help of Robin Rosenberg I've been able to make jgit's log > operation run (on average) within a few milliseconds of core Git. Very good. Are we any closer to actually having an eclipse plugin then? Not that I've ever actually used eclipse, but maybe I should try it, just to see what those strange user-land people actually do. I'll be a veritable Jane Goodall.. > Walking the 50,000 most recent commits from the Mozilla trunk[1]: > > $ time git rev-list --max-count=50000 HEAD >/dev/null > > core Git: 1.882s (average) > jgit: 1.932s (average) > > (times are with hot cache and from repeated executions) Now, the _interesting_ case in many ways is not "--max-count", but the revision limiter. It _should_ be equally fast, but if you've done something wrong, it won't be. IOW, try to find a point far enough back in time to get about the same number of commits, and then do time git rev-list <thatpoint>..HEAD >/dev/null because one of the things you want to handle is ranges, more so than simple counts. And that is not only the much more common case, it also triggers a few cases that you probably didn't trigger with the regular "list the first 50 thousand commits" case. > One of the biggest annoyances has been the fact that although Java > 1.4 offers a way to mmap a file into the process, the overhead to > access that data seems to be far higher than just reading the file > content into a very large byte array, especially if we are going > to access that file content multiple times. That must suck for big packed repositories. What JVM and other environment are you using? Also, I have to say, one of the reasons I'm interested in your project is that I've never done any Java programming, because quite frankly, I've never had any reason what-so-ever to do so. But if there is some simple setup, and you have jgit exposed somewhere as a git archive, I'd love to take a look, if only to finally learn more about Java. Linus - 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