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view tests/test-impexp-branch.t @ 26845:7a77ee434179
help: replace some str.split() calls by str.partition() or str.rpartition()
Since Python 2.5 str has new methods: partition and rpartition. They are more
specialized than the usual split and rsplit, and they sometimes convey the
intent of code better and also are a bit faster (faster than split/rsplit with
maxsplit specified). Let's use them in appropriate places for a small speedup.
Example performance (partition):
$ python -m timeit 'assert "apple|orange|banana".split("|")[0] == "apple"'
1000000 loops, best of 3: 0.376 usec per loop
$ python -m timeit 'assert "apple|orange|banana".split("|", 1)[0] == "apple"'
1000000 loops, best of 3: 0.327 usec per loop
$ python -m timeit 'assert "apple|orange|banana".partition("|")[0] == "apple"'
1000000 loops, best of 3: 0.214 usec per loop
Example performance (rpartition):
$ python -m timeit 'assert "apple|orange|banana".rsplit("|")[-1] == "banana"'
1000000 loops, best of 3: 0.372 usec per loop
$ python -m timeit 'assert "apple|orange|banana".rsplit("|", 1)[-1] == "banana"'
1000000 loops, best of 3: 0.332 usec per loop
$ python -m timeit 'assert "apple|orange|banana".rpartition("|")[-1] == "banana"'
1000000 loops, best of 3: 0.219 usec per loop
author | Anton Shestakov <av6@dwimlabs.net> |
---|---|
date | Mon, 02 Nov 2015 23:37:14 +0800 |
parents | efedda4aed49 |
children | 75be14993fda |
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$ echo '[extensions]' >> $HGRCPATH $ echo 'strip =' >> $HGRCPATH $ cat >findbranch.py <<EOF > import re, sys > > head_re = re.compile('^#(?:(?:\\s+([A-Za-z][A-Za-z0-9_]*)(?:\\s.*)?)|(?:\\s*))$') > > for line in sys.stdin: > hmatch = head_re.match(line) > if not hmatch: > sys.exit(1) > if hmatch.group(1) == 'Branch': > sys.exit(0) > sys.exit(1) > EOF $ hg init a $ cd a $ echo "Rev 1" >rev $ hg add rev $ hg commit -m "No branch." $ hg branch abranch marked working directory as branch abranch (branches are permanent and global, did you want a bookmark?) $ echo "Rev 2" >rev $ hg commit -m "With branch." $ hg export 0 > ../r0.patch $ hg export 1 > ../r1.patch $ cd .. $ if python findbranch.py < r0.patch; then > echo "Export of default branch revision has Branch header" 1>&2 > exit 1 > fi $ if python findbranch.py < r1.patch; then > : # Do nothing > else > echo "Export of branch revision is missing Branch header" 1>&2 > exit 1 > fi Make sure import still works with branch information in patches. $ hg init b $ cd b $ hg import ../r0.patch applying ../r0.patch $ hg import ../r1.patch applying ../r1.patch $ cd .. $ hg init c $ cd c $ hg import --exact --no-commit ../r0.patch applying ../r0.patch warning: can't check exact import with --no-commit $ hg st A rev $ hg revert -a forgetting rev $ rm rev $ hg import --exact ../r0.patch applying ../r0.patch $ hg import --exact ../r1.patch applying ../r1.patch Test --exact and patch header separators (issue3356) $ hg strip --no-backup . 1 files updated, 0 files merged, 0 files removed, 0 files unresolved >>> import re >>> p = file('../r1.patch', 'rb').read() >>> p = re.sub(r'Parent\s+', 'Parent ', p) >>> file('../r1-ws.patch', 'wb').write(p) $ hg import --exact ../r1-ws.patch applying ../r1-ws.patch $ cd ..