Jakub Narebski wrote:
"Edward Ned Harvey" <git@xxxxxxxxxxxxx> writes:
I see things all over the Internet saying git is fast. I'm
currently struggling with poor svn performance and poor attitude of
svn developers, so I'd like to consider switching to git. A quick
question first.
The core of the performance problem I'm facing is the need to "walk
the tree" for many thousand files. Every time I do "svn update" or
"svn status" the svn client must stat every file to check for local
modifications (a coffee cup or a beer worth of stats). In essence,
this is unavoidable if there is no mechanism to constantly monitor
filesystem activity during normal operations. Analogous to
filesystem journaling.
So - I didn't see anything out there saying "git is fast because it
uses inotify" or anything like that. Perhaps git would not help me
at all? Because git still needs to stat all the files in the tree?
http://git.or.cz/gitwiki/GitBenchmarks
While it should be possible to use 'assume unchanged' bit together
with inotify / icron, it is not something tha is done; IIRC Mercurial
had Linux-only InotifyPlugin...
Well, inotify() is Linux specific, so it'd be quite hard to support on
another platform. Emulating it with a billion stat() calls feels rather
like a disk (and I/O performance) killer.
--
Andreas Ericsson andreas.ericsson@xxxxxx
OP5 AB www.op5.se
Tel: +46 8-230225 Fax: +46 8-230231
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