branchmap: Save changectx creation during update
The newly introduced `branchmap` function allows us to skip the
creation of changectx objects. This speeds up the construction of
the branchmap.
On the mozilla repository (117293 changesets, 15490 mutable)
Before:
! impactable 19.9
! mutable 0.576
! unserved 3.16
After:
! impactable 7.03 (2.8x faster)
! mutable 0.352 (1.6x)
! unserved 1.15 (2.7x)
On the cpython repository (81418 changesets, 6418 mutable)
Before:
! impactable 15.9
! mutable 0.451
! unserved 0.861
After:
! impactable 6.55 (2.4x faster)
! mutable 0.170 (2.6x faster)
! unserved 0.289 (2.9x faster)
On the pypy repository (58852 changesets)
Before:
! impactable 13.6
After:
! impactable 6.17 (2.2x faster)
On my Mercurial repository (18295 changesets, 2210 mutable)
Before:
! impactable 23.9
! mutable 0.368
! unserved 0.057
After:
! impactable 1.31 (18x faster)
! mutable 0.042 (8.7x)
! unserved 0.025 (2.2x)
Create user cache directory
$ USERCACHE=`pwd`/cache; export USERCACHE
$ cat <<EOF >> ${HGRCPATH}
> [extensions]
> hgext.largefiles=
> [largefiles]
> usercache=${USERCACHE}
> EOF
$ mkdir -p ${USERCACHE}
Create source repo, and commit adding largefile.
$ hg init src
$ cd src
$ echo large > large
$ hg add --large large
$ hg commit -m 'add largefile'
$ cd ..
Discard all cached largefiles in USERCACHE
$ rm -rf ${USERCACHE}
Create mirror repo, and pull from source without largefile:
"pull" is used instead of "clone" for suppression of (1) updating to
tip (= cahcing largefile from source repo), and (2) recording source
repo as "default" path in .hg/hgrc.
$ hg init mirror
$ cd mirror
$ hg pull ../src
pulling from ../src
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)
caching new largefiles
0 largefiles cached
Update working directory to "tip", which requires largefile("large"),
but there is no cache file for it. So, hg must treat it as
"missing"(!) file.
$ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
getting changed largefiles
error getting 7f7097b041ccf68cc5561e9600da4655d21c6d18 from file:$TESTTMP/mirror for large: can't get file locally (glob)
0 largefiles updated, 0 removed
$ hg status
! large
Update working directory to null: this cleanup .hg/largefiles/dirstate
$ hg update null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
getting changed largefiles
0 largefiles updated, 0 removed
Update working directory to tip, again.
$ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
getting changed largefiles
error getting 7f7097b041ccf68cc5561e9600da4655d21c6d18 from file:$TESTTMP/mirror for large: can't get file locally (glob)
0 largefiles updated, 0 removed
$ hg status
! large
$ cd ..
#if unix-permissions
Portable way to print file permissions:
$ cat > ls-l.py <<EOF
> #!/usr/bin/env python
> import sys, os
> path = sys.argv[1]
> print '%03o' % (os.lstat(path).st_mode & 0777)
> EOF
$ chmod +x ls-l.py
Test that files in .hg/largefiles inherit mode from .hg/store, not
from file in working copy:
$ cd src
$ chmod 750 .hg/store
$ chmod 660 large
$ echo change >> large
$ hg commit -m change
$ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
640
Test permission of with files in .hg/largefiles created by update:
$ cd ../mirror
$ rm -r "$USERCACHE" .hg/largefiles # avoid links
$ chmod 750 .hg/store
$ hg pull ../src --update -q
$ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
640
Test permission of files created by push:
$ hg serve -R ../src -d -p $HGPORT --pid-file hg.pid \
> --config "web.allow_push=*" --config web.push_ssl=no
$ cat hg.pid >> $DAEMON_PIDS
$ echo change >> large
$ hg commit -m change
$ rm -r "$USERCACHE"
$ hg push -q http://localhost:$HGPORT/
$ ../ls-l.py ../src/.hg/largefiles/b734e14a0971e370408ab9bce8d56d8485e368a9
640
$ cd ..
#endif