tests/heredoctest.py

revset: prefetch an attribute in _generatorset.__iter__

Python's attribute lookup are expensible, lets do less of them.

This gives us a 7% speedup on this revset iteration (from 0.063403 to 0.059032)

import sys

globalvars = {}
lines = sys.stdin.readlines()
while lines:
    l = lines.pop(0)
    if l.startswith('SALT'):
        print l[:-1]
    elif l.startswith('>>> '):
        snippet = l[4:]
        while lines and lines[0].startswith('... '):
            l = lines.pop(0)
            snippet += l[4:]
        c = compile(snippet, '<heredoc>', 'single')
        try:
            exec c in globalvars
        except Exception, inst:
            print repr(inst)