Mercurial > hg
view tests/md5sum.py @ 22357:9c3c3dc14a65
branchmap: pre-filter topological heads before ancestors based filtering
We know that topological heads will not be ancestors of anything, so we filter
them out to potentially reduce the range of the ancestors computation.
On a strongly headed repo this gives humble speedup:
from 0.1984 to 0.1629
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Sat, 30 Aug 2014 12:33:12 +0200 |
parents | 1ffeeb91c55d |
children | 328739ea70c3 |
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#!/usr/bin/env python # # Based on python's Tools/scripts/md5sum.py # # This software may be used and distributed according to the terms # of the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2, which is # GPL-compatible. import sys, os try: from hashlib import md5 except ImportError: from md5 import md5 try: import msvcrt msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY) except ImportError: pass for filename in sys.argv[1:]: try: fp = open(filename, 'rb') except IOError, msg: sys.stderr.write('%s: Can\'t open: %s\n' % (filename, msg)) sys.exit(1) m = md5() try: while True: data = fp.read(8192) if not data: break m.update(data) except IOError, msg: sys.stderr.write('%s: I/O error: %s\n' % (filename, msg)) sys.exit(1) sys.stdout.write('%s %s\n' % (m.hexdigest(), filename)) sys.exit(0)