Mercurial > hg
view tests/test-diff-upgrade.t @ 24461:05ccfe6763f1
osutil: use getdirentriesattr on OS X if possible
This is a significant win for large repositories on OS X, especially with a
cold cache. Unfortunately we need to keep the lstat-based implementation around
for two reasons:
- Not all filesystems support this call.
- There's an edge case in which it's best to fall back to avoid a retry loop.
More about this in the comments.
The below tests are all performed on a Mac with an SSD running OS X 10.9, on a
repository with over 200k files. The results are best of 5 with simulated
best-effort conditions.
The gains with a hot cache are pretty impressive: 'hg status' goes from 5.18
seconds to 3.79 seconds.
However, a repository that large will probably already be using something like
hgwatchman [1], which helps much more (for this repo, 'hg status' with
hgwatchman is approximately 1 second). Where this really helps is when the
cache is cold [2]: hg status goes from 31.0 seconds to 9.66.
See http://lists.apple.com/archives/filesystem-dev/2014/Dec/msg00002.html for
some more discussion about this function.
This is based on a patch by Sean Farley <sean@farley.io>.
[1] https://bitbucket.org/facebook/hgwatchman
[2] There appears to be no easy way to clear the file cache (aka "vnodes") on
OS X short of rebooting. purge(8) purportedly does that but in my testing had
little effect. The workaround I came up with was to assume that vnode eviction
was LRU, make sure the kern.maxvnodes sysctl is smaller than the size of the
repository, then make sure we'd always miss the cache by running 'hg status' in
another clone of the repository before running it in the test repository.
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Wed, 25 Mar 2015 15:55:31 -0700 |
parents | e955549cd045 |
children | 15ddf83fbf84 |
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#require execbit $ cat <<EOF >> $HGRCPATH > [extensions] > autodiff = $TESTDIR/autodiff.py > [diff] > nodates = 1 > EOF $ hg init repo $ cd repo make a combination of new, changed and deleted file $ echo regular > regular $ echo rmregular > rmregular $ $PYTHON -c "file('bintoregular', 'wb').write('\0')" $ touch rmempty $ echo exec > exec $ chmod +x exec $ echo rmexec > rmexec $ chmod +x rmexec $ echo setexec > setexec $ echo unsetexec > unsetexec $ chmod +x unsetexec $ echo binary > binary $ $PYTHON -c "file('rmbinary', 'wb').write('\0')" $ hg ci -Am addfiles adding binary adding bintoregular adding exec adding regular adding rmbinary adding rmempty adding rmexec adding rmregular adding setexec adding unsetexec $ echo regular >> regular $ echo newregular >> newregular $ rm rmempty $ touch newempty $ rm rmregular $ echo exec >> exec $ echo newexec > newexec $ echo bintoregular > bintoregular $ chmod +x newexec $ rm rmexec $ chmod +x setexec $ chmod -x unsetexec $ $PYTHON -c "file('binary', 'wb').write('\0\0')" $ $PYTHON -c "file('newbinary', 'wb').write('\0')" $ rm rmbinary $ hg addremove -s 0 adding newbinary adding newempty adding newexec adding newregular removing rmbinary removing rmempty removing rmexec removing rmregular git=no: regular diff for all files $ hg autodiff --git=no diff -r a66d19b9302d binary Binary file binary has changed diff -r a66d19b9302d bintoregular Binary file bintoregular has changed diff -r a66d19b9302d exec --- a/exec +++ b/exec @@ -1,1 +1,2 @@ exec +exec diff -r a66d19b9302d newbinary Binary file newbinary has changed diff -r a66d19b9302d newexec --- /dev/null +++ b/newexec @@ -0,0 +1,1 @@ +newexec diff -r a66d19b9302d newregular --- /dev/null +++ b/newregular @@ -0,0 +1,1 @@ +newregular diff -r a66d19b9302d regular --- a/regular +++ b/regular @@ -1,1 +1,2 @@ regular +regular diff -r a66d19b9302d rmbinary Binary file rmbinary has changed diff -r a66d19b9302d rmexec --- a/rmexec +++ /dev/null @@ -1,1 +0,0 @@ -rmexec diff -r a66d19b9302d rmregular --- a/rmregular +++ /dev/null @@ -1,1 +0,0 @@ -rmregular git=yes: git diff for single regular file $ hg autodiff --git=yes regular diff --git a/regular b/regular --- a/regular +++ b/regular @@ -1,1 +1,2 @@ regular +regular git=auto: regular diff for regular files and non-binary removals $ hg autodiff --git=auto regular newregular rmregular rmexec diff -r a66d19b9302d newregular --- /dev/null +++ b/newregular @@ -0,0 +1,1 @@ +newregular diff -r a66d19b9302d regular --- a/regular +++ b/regular @@ -1,1 +1,2 @@ regular +regular diff -r a66d19b9302d rmexec --- a/rmexec +++ /dev/null @@ -1,1 +0,0 @@ -rmexec diff -r a66d19b9302d rmregular --- a/rmregular +++ /dev/null @@ -1,1 +0,0 @@ -rmregular $ for f in exec newexec setexec unsetexec binary newbinary newempty rmempty rmbinary bintoregular; do > echo > echo '% git=auto: git diff for' $f > hg autodiff --git=auto $f > done % git=auto: git diff for exec diff -r a66d19b9302d exec --- a/exec +++ b/exec @@ -1,1 +1,2 @@ exec +exec % git=auto: git diff for newexec diff --git a/newexec b/newexec new file mode 100755 --- /dev/null +++ b/newexec @@ -0,0 +1,1 @@ +newexec % git=auto: git diff for setexec diff --git a/setexec b/setexec old mode 100644 new mode 100755 % git=auto: git diff for unsetexec diff --git a/unsetexec b/unsetexec old mode 100755 new mode 100644 % git=auto: git diff for binary diff --git a/binary b/binary index a9128c283485202893f5af379dd9beccb6e79486..09f370e38f498a462e1ca0faa724559b6630c04f GIT binary patch literal 2 Jc${Nk0000200961 % git=auto: git diff for newbinary diff --git a/newbinary b/newbinary new file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..f76dd238ade08917e6712764a16a22005a50573d GIT binary patch literal 1 Ic${MZ000310RR91 % git=auto: git diff for newempty diff --git a/newempty b/newempty new file mode 100644 % git=auto: git diff for rmempty diff --git a/rmempty b/rmempty deleted file mode 100644 % git=auto: git diff for rmbinary diff --git a/rmbinary b/rmbinary deleted file mode 100644 index f76dd238ade08917e6712764a16a22005a50573d..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 GIT binary patch literal 0 Hc$@<O00001 % git=auto: git diff for bintoregular diff --git a/bintoregular b/bintoregular index f76dd238ade08917e6712764a16a22005a50573d..9c42f2b6427d8bf034b7bc23986152dc01bfd3ab GIT binary patch literal 13 Uc$`bh%qz(+N=+}#Ni5<5043uE82|tP git=warn: regular diff with data loss warnings $ hg autodiff --git=warn diff -r a66d19b9302d binary Binary file binary has changed diff -r a66d19b9302d bintoregular Binary file bintoregular has changed diff -r a66d19b9302d exec --- a/exec +++ b/exec @@ -1,1 +1,2 @@ exec +exec diff -r a66d19b9302d newbinary Binary file newbinary has changed diff -r a66d19b9302d newexec --- /dev/null +++ b/newexec @@ -0,0 +1,1 @@ +newexec diff -r a66d19b9302d newregular --- /dev/null +++ b/newregular @@ -0,0 +1,1 @@ +newregular diff -r a66d19b9302d regular --- a/regular +++ b/regular @@ -1,1 +1,2 @@ regular +regular diff -r a66d19b9302d rmbinary Binary file rmbinary has changed diff -r a66d19b9302d rmexec --- a/rmexec +++ /dev/null @@ -1,1 +0,0 @@ -rmexec diff -r a66d19b9302d rmregular --- a/rmregular +++ /dev/null @@ -1,1 +0,0 @@ -rmregular data lost for: binary data lost for: bintoregular data lost for: newbinary data lost for: newempty data lost for: newexec data lost for: rmbinary data lost for: rmempty data lost for: setexec data lost for: unsetexec git=abort: fail on execute bit change $ hg autodiff --git=abort regular setexec abort: losing data for setexec [255] git=abort: succeed on regular file $ hg autodiff --git=abort regular diff -r a66d19b9302d regular --- a/regular +++ b/regular @@ -1,1 +1,2 @@ regular +regular $ cd ..