view tests/readlink.py @ 18869:e8b4b139a545

dirstate: only call lstat once per flags invocation

This makes a big difference to performance in some cases.

hg --time locate 'set:symlink()'

mozilla-central (70,000 files):

  before: 2.92 sec
  after:  2.47

another repo (170,000 files):

  before: 7.87 sec
  after:  6.86

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError, err:
        if err.errno != errno.EINVAL:
            raise
        print f, 'not a symlink'

sys.exit(0)