Mercurial > hg
view .hgignore @ 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 | 3232f92360d4 |
children | a1eff44c432b |
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syntax: glob *.elc *.tmp *.orig *.rej *~ *.mergebackup *.o *.so *.dll *.exe *.pyd *.pyc *.pyo *$py.class *.swp *.prof *.zip \#*\# .\#* tests/.coverage* tests/annotated tests/*.err tests/htmlcov build contrib/hgsh/hgsh contrib/vagrant/.vagrant dist packages doc/common.txt doc/*.[0-9] doc/*.[0-9].txt doc/*.[0-9].gendoc.txt doc/*.[0-9].{x,ht}ml MANIFEST MANIFEST.in patches mercurial/__version__.py mercurial/hgpythonlib.h mercurial.egg-info .DS_Store tags cscope.* .idea/* i18n/hg.pot locale/*/LC_MESSAGES/hg.mo hgext/__index__.py # files installed with a local --pure build mercurial/base85.py mercurial/bdiff.py mercurial/diffhelpers.py mercurial/mpatch.py mercurial/osutil.py mercurial/parsers.py syntax: regexp ^\.pc/ ^\.(pydev)?project # hackable windows distribution additions ^hg-python ^hg.py$