log: speed up hg log for untracked files (
issue1340)
'hg log' on untracked files tends to be fairly slow. The root cause is that we end up using the 'slowpath' when we can't find a revlog for the files listed. This could happen if the file in question is an untracked file, or it is a directory.
This diff tries to speed up 'hg log' (by avoiding the slowpath) for files if we can determine if that file is not (and was never) a directory. We use the previously added store.__contains__ methods to test if the directory exists (or existed) in the store.
To avoid changing any existing semantics, this 'optimization' kicks in only when none of the files listed as arguments to the hg log command exist in the store.
$ hg init a
$ cd a
$ cp "$TESTDIR/binfile.bin" .
$ hg add binfile.bin
$ hg ci -m 'add binfile.bin'
$ echo >> binfile.bin
$ hg ci -m 'change binfile.bin'
$ hg revert -r 0 binfile.bin
$ hg ci -m 'revert binfile.bin'
$ hg diff --nodates -r 0 -r 1
diff -r 48b371597640 -r acea2ab458c8 binfile.bin
Binary file binfile.bin has changed
$ hg diff --nodates -r 0 -r 2
$ hg diff --git -r 0 -r 1
diff --git a/binfile.bin b/binfile.bin
index 37ba3d1c6f17137d9c5f5776fa040caf5fe73ff9..58dc31a9e2f40f74ff3b45903f7d620b8e5b7356
GIT binary patch
literal 594
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$ hg diff --git -r 0 -r 2
$ cd ..