contrib/tmplrewrite.py

encoding: add fast-path for ASCII uppercase.

This copies the performance hack from encoding.lower (c481761033bd).

The case-folding logic that kicks in on case-insensitive filesystems
hits encoding.upper hard: with a repository with 75k files, the
timings went from

  hg perfstatus
  ! wall 3.156000 comb 3.156250 user 1.625000 sys 1.531250 (best of 3)

to

  hg perfstatus
  ! wall 2.390000 comb 2.390625 user 1.078125 sys 1.312500 (best of 5)

This is a 24% decrease. For comparison, Mercurial 2.0 gives:

  hg perfstatus
  ! wall 2.172000 comb 2.171875 user 0.984375 sys 1.187500 (best of 5)

so we're only 10% slower than before we added the extra case-folding
logic.

The same decrease is seen when executing 'hg status' as normal, where
we go from:

  hg status --time
  time: real 4.322 secs (user 2.219+0.000 sys 2.094+0.000)

to

  hg status --time
  time: real 3.307 secs (user 1.750+0.000 sys 1.547+0.000)

#!/usr/bin/python
import sys, os, re

IGNORE = ['.css', '.py']
oldre = re.compile('#([\w\|%]+)#')

def rewrite(fn):
    f = open(fn)
    new = open(fn + '.new', 'wb')
    for ln in f:
        new.write(oldre.sub('{\\1}', ln))
    new.close()
    f.close()
    os.rename(new.name, f.name)

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print 'usage: python tmplrewrite.py [file [file [file]]]'
    for fn in sys.argv[1:]:
        if os.path.splitext(fn) in IGNORE:
            continue
        print 'rewriting %s...' % fn
        rewrite(fn)