Mercurial > hgsubversion
view tests/fixtures/mergeexternals.sh @ 889:7a98fbadcae9
revsets: huge speedups for fromsvn and svnrev
I have a hgsubversion repo that contains over 300,000 commits.
In that repo, this patch improves performance as follows:
hg --time log -r 'first(fromsvn())'
Before: 40.3 sec
After: 0.8 sec
hg --time log -r 'svnrev(350000)'
Before: 40.3 sec
After: 0.1 sec
Note: the performance of these revset implementations is very sensitive
to doing as little work as possible per line of the rev_map file.
I originally attempted to hide the file format details by hoisting the
parsing of each line up into RevMap.readmapfile, but the current less
abstract code is dramatically (10x or more) faster.
If the revmap file is missing, we error out and print a message
describing what to do.
| author | Bryan O'Sullivan <bryano@fb.com> |
|---|---|
| date | Sat, 12 May 2012 05:38:34 -0700 |
| parents | ba65c0b01d4f |
| children |
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#!/bin/sh # # Generate mergeexternals.svndump # mkdir temp cd temp mkdir project-orig cd project-orig mkdir trunk mkdir branches cd .. svnadmin create testrepo svnurl=file://`pwd`/testrepo svn import project-orig $svnurl -m "init project" svn co $svnurl project cd project/trunk mkdir d1 echo a > d1/a mkdir d2 echo b > d2/b mkdir -p common/ext echo c > common/ext/c svn add d1 d2 common svn ci -m addfiles svn up svn propset svn:externals '^/trunk/common/ext ext' d1 svn propset svn:externals '^/trunk/common/ext ext' d2 svn ci -m addexternals cd .. svn up svn cp trunk branches/branch cd branches svn ci -m addbranch cd branch mkdir d3 echo d > d3/d svn add d3 svn propset svn:externals '^/trunk/common/ext ext3' d3 svn ci -m touchbranch cd ../../trunk svn merge '^/branches/branch' svn up svn ci -m 'merge' cd ../.. svnadmin dump testrepo > ../mergeexternals.svndump