Mercurial > hg
view tests/revlog-formatv0.py @ 32783:4483696dacee
profile: upgrade the "profile" context manager to a full class
So far we have been able to use a simple decorator for this. However using the
current context manager makes the scope of the profiling in dispatch
constrainted and the time frame to decide to enable profiling quite limited
(using "maybeprofile")
This is the first step toward the ability to enable the profiling from within
the profiling scope. eg::
with maybeprofiling(ui) as profiler:
...
bar.foo():
...
if options['profile']:
profiler.start()
...
fooz()
...
My target usecase is adding support for "--profile" to alias definitions with
effect. These are to be used with "profiling.output=blackbox" to gather data
about operation that get slow from time to time (eg: pull being minutes instead
of seconds from time to time).
Of course, in such case, the scope of the profiling would be smaller since
profiler would be started after running extensions 'reposetup' (and other
potentially costly logic), but these are not relevant for my target usecase
(multiple second commits, multiple tens of seconds pull).
Currently adding '--profile' to a command through alias requires to re-spin a
Mercurial binary (using "!$HG" in alias), which as a significant performance
impact, especially in context where startup performance is being worked on...
An alternative approach would be to stop using the context manager in dispatch
and move back to a try/finally setup.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 08 Jun 2017 01:38:48 +0100 |
parents | 05982f7ab231 |
children | 3e3f4c03876b |
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#!/usr/bin/env python # Copyright 2010 Intevation GmbH # Author(s): # Thomas Arendsen Hein <thomas@intevation.de> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """Create a Mercurial repository in revlog format 0 changeset: 0:a1ef0b125355 tag: tip user: user date: Thu Jan 01 00:00:00 1970 +0000 files: empty description: empty file """ from __future__ import absolute_import import os import sys files = [ ('formatv0/.hg/00changelog.i', '000000000000004400000000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '0000a1ef0b125355d27765928be600cfe85784284ab3'), ('formatv0/.hg/00changelog.d', '756163613935613961356635353036303562366138343738336237' '61623536363738616436356635380a757365720a3020300a656d70' '74790a0a656d7074792066696c65'), ('formatv0/.hg/00manifest.i', '000000000000003000000000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '0000aca95a9a5f550605b6a84783b7ab56678ad65f58'), ('formatv0/.hg/00manifest.d', '75656d707479006238306465356431333837353835343163356630' '35323635616431343461623966613836643164620a'), ('formatv0/.hg/data/empty.i', '000000000000000000000000000000000000000000000000000000' '000000000000000000000000000000000000000000000000000000' '0000b80de5d138758541c5f05265ad144ab9fa86d1db'), ('formatv0/.hg/data/empty.d', ''), ] def makedirs(name): """recursive directory creation""" parent = os.path.dirname(name) if parent: makedirs(parent) os.mkdir(name) makedirs(os.path.join(*'formatv0/.hg/data'.split('/'))) for name, data in files: f = open(name, 'wb') f.write(data.decode('hex')) f.close() sys.exit(0)