revlog: make _partialmatch fail fast on almost-hex inputs
Before this change, resolving a revision like [0123456789^] on
a large repo can take multiple seconds because:
- hg does not realize this is a revset, so it tries various things,
including _partialmatch(b"0123456789^")
- after the rust lookup fails, it falls back to pure hg
- pure hg takes all-but-last chars and converts them to binary,
which *succeeds*, so it does the expensive part.
# coding: utf8
# ext-sidedata-4.py - small extension to test (differently still) the sidedata
# logic
#
# Simulates a server for a complex sidedata exchange.
#
# Copyright 2021 Raphaël Gomès <rgomes@octobus.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from mercurial.revlogutils import sidedata
def reposetup(ui, repo):
repo.register_wanted_sidedata(sidedata.SD_TEST2)
repo.register_wanted_sidedata(sidedata.SD_TEST3)