contrib/perf.py

30142:3dcaf1c4e90d

    fm.write('user', ' user %f', m[1])
    fm.write('sys',  ' sys %f', m[2])
    fm.write('count',  ' (best of %d)', count)
    fm.plain('\n')

@command('perfwalk', formatteropts)
def perfwalk(ui, repo, *pats, **opts):
    timer, fm = gettimer(ui, opts)
    try:
        m = scmutil.match(repo[None], pats, {})

30143:2d858c771760

    fm.write('user', ' user %f', m[1])
    fm.write('sys',  ' sys %f', m[2])
    fm.write('count',  ' (best of %d)', count)
    fm.plain('\n')

# utilities for historical portability

def safeattrsetter(obj, name, ignoremissing=False):
    """Ensure that 'obj' has 'name' attribute before subsequent setattr

    This function is aborted, if 'obj' doesn't have 'name' attribute
    at runtime. This avoids overlooking removal of an attribute, which
    breaks assumption of performance measurement, in the future.

    This function returns the object to (1) assign a new value, and
    (2) restore an original value to the attribute.

    If 'ignoremissing' is true, missing 'name' attribute doesn't cause
    abortion, and this function returns None. This is useful to
    examine an attribute, which isn't ensured in all Mercurial
    versions.
    """
    if not util.safehasattr(obj, name):
        if ignoremissing:
            return None
        raise error.Abort(("missing attribute %s of %s might break assumption"
                           " of performance measurement") % (name, obj))

    origvalue = getattr(obj, name)
    class attrutil(object):
        def set(self, newvalue):
            setattr(obj, name, newvalue)
        def restore(self):
            setattr(obj, name, origvalue)

    return attrutil()

# perf commands

@command('perfwalk', formatteropts)
def perfwalk(ui, repo, *pats, **opts):
    timer, fm = gettimer(ui, opts)
    try:
        m = scmutil.match(repo[None], pats, {})