view tests/failfilemerge.py @ 31697:992882cef7e1

fileset: perform membership test against set for status queries

Previously, fileset functions operating on status items performed
membership tests against a list of items. When there are thousands
of items having a specific status, that test can be extremely
slow. Changing the membership test to a set makes this operation
substantially faster.

On the mozilla-central repo:

$ hg files -r d14cac631ecc 'set:added()'
before: 28.120s
after:   0.860s

$ hg status --change d14cac631ecc --added
0.690s

# extension to emulate interrupting filemerge._filemerge

from __future__ import absolute_import

from mercurial import (
    error,
    extensions,
    filemerge,
)

def failfilemerge(filemergefn,
                  premerge, repo, mynode, orig, fcd, fco, fca, labels=None):
    raise error.Abort("^C")
    return filemergefn(premerge, repo, mynode, orig, fcd, fco, fca, labels)

def extsetup(ui):
    extensions.wrapfunction(filemerge, '_filemerge',
                            failfilemerge)