contrib/benchmarks/perf.py

dirstate-item: replace another usage of `merged`

We simply spell out the logic here. This was the last usage of `merged`.

Differential Revision: https://phab.mercurial-scm.org/D11596

# perf.py - asv benchmarks using contrib/perf.py extension
#
# Copyright 2016 Logilab SA <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from . import perfbench


@perfbench()
def track_tags(perf):
    return perf("perftags")


@perfbench()
def track_status(perf):
    return perf("perfstatus", unknown=False)


@perfbench(params=[('rev', ['1000', '10000', 'tip'])])
def track_manifest(perf, rev):
    return perf("perfmanifest", rev)


@perfbench()
def track_heads(perf):
    return perf("perfheads")