Folks:
A new user started to convert his company to darcs, but then had to
back out and go back to using SVN when it turned out that "darcs
whatsnew" took 17 seconds and his co-workers couldn't stand that.
(The equivalent call, "svn diff" takes around 1.7 seconds -- about
10x as fast.)
He gave me this count of files:
find . -type f |grep -v \.svn|wc
4762 4763 229874
He gave me an strace of "darcs whatsnew" with -t (print relative
timestamp) and -T (print time spent in each syscall). The whole
thing is interesting reading. For example:
grep 'stat64("/home/darcs-cache//pristine.hashed"' log2 | wc -l
3578
It looks like there is probably quite a bit of room for optimization
in darcs-2's use of the filesystem.
Regards,
Zooko
Here is the log.bz2 file. Sorry for the long URL:
http://tahoebs1.allmydata.com:8123/uri/URI%3ACHK%
3Ahzdsgztpvd5uip4tb7uaude4ua%
3Acgwu6vnrspq2hxpb4gugs6yprn2iyuz7tpk7k7yesqvnkffksh4q%3A3%3A10%
3A807696?filename=log2.bz2
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