Mercurial > hg
view tests/test-parseindex.t @ 21986:48166e46f111
locate: use ctx.matches instead of ctx.walk
On mozilla-central, which is around 100,000 files, best of 5:
$ hg --time locate > /dev/null
before: real 1.460 secs (user 1.140+0.000 sys 0.320+0.000)
after: real 0.620 secs (user 0.610+0.000 sys 0.020+0.000)
$ hg --time locate README > /dev/null
before: real 0.630 secs (user 0.330+0.000 sys 0.290+0.000)
after: real 0.120 secs (user 0.110+0.000 sys 0.020+0.000)
Larger repositories see correspondingly larger performance gains.
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Fri, 01 Aug 2014 22:16:54 -0700 |
parents | f2719b387380 |
children | 82d6a35cf432 |
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revlog.parseindex must be able to parse the index file even if an index entry is split between two 64k blocks. The ideal test would be to create an index file with inline data where 64k < size < 64k + 64 (64k is the size of the read buffer, 64 is the size of an index entry) and with an index entry starting right before the 64k block boundary, and try to read it. We approximate that by reducing the read buffer to 1 byte. $ hg init a $ cd a $ echo abc > foo $ hg add foo $ hg commit -m 'add foo' $ echo >> foo $ hg commit -m 'change foo' $ hg log -r 0: changeset: 0:7c31755bf9b5 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: add foo changeset: 1:26333235a41c tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: change foo $ cat >> test.py << EOF > from mercurial import changelog, scmutil > from mercurial.node import * > > class singlebyteread(object): > def __init__(self, real): > self.real = real > > def read(self, size=-1): > if size == 65536: > size = 1 > return self.real.read(size) > > def __getattr__(self, key): > return getattr(self.real, key) > > def opener(*args): > o = scmutil.opener(*args) > def wrapper(*a): > f = o(*a) > return singlebyteread(f) > return wrapper > > cl = changelog.changelog(opener('.hg/store')) > print len(cl), 'revisions:' > for r in cl: > print short(cl.node(r)) > EOF $ python test.py 2 revisions: 7c31755bf9b5 26333235a41c $ cd ..