comparison mercurial/posix.py @ 22781:70624fda193d

normcase: for darwin, use fast ASCII lower

Constructing the foldmap is much faster on OS X now. For a large real-world
repo, hg perfdirstatefoldmap:

before: wall 0.805278 comb 0.800000 user 0.790000 sys 0.010000 (best of 13)
after:  wall 0.399708 comb 0.410000 user 0.390000 sys 0.020000 (best of 25)

This is a nice boost to 'hg status', especially with the third-party hgwatchman
extension enabled (which eliminates stat calls). For the above repo, 'hg
status' goes from 1.17 seconds to 0.74.

22780:d8ff1f671aed

        >>> normcase('\xb8\xca\xc3\xca\xbe\xc8.JPG') # issue3918
        '%b8%ca%c3\\xca\\xbe%c8.jpg'
        '''

        try:
            path.decode('ascii') # throw exception for non-ASCII character
            return path.lower()
        except UnicodeDecodeError:
            pass
        try:
            u = path.decode('utf-8')
        except UnicodeDecodeError:

22781:70624fda193d

        >>> normcase('\xb8\xca\xc3\xca\xbe\xc8.JPG') # issue3918
        '%b8%ca%c3\\xca\\xbe%c8.jpg'
        '''

        try:
            return encoding.asciilower(path)  # exception for non-ASCII
        except UnicodeDecodeError:
            pass
        try:
            u = path.decode('utf-8')
        except UnicodeDecodeError: