util: make chunkbuffer non-quadratic on Windows
The old str-based += collector performed very nicely on Linux, but
turns out to be quadratically expensive on Windows, causing
chunkbuffer to dominate in profiles.
This list-based version has been measured to significantly improve
performance with large chunks on Windows, with negligible overall
overhead on Linux (though microbenchmarks show it to be about 50% slower).
This may increase memory overhead where += didn't behave quadratically. If we
want to gather up 1G of data to join, we temporarily have 1G in our
list and 1G in our string.
======
hgrc
======
---------------------------------
configuration files for Mercurial
---------------------------------
:Author: Bryan O'Sullivan <bos@serpentine.com>
:Organization: Mercurial
:Manual section: 5
:Manual group: Mercurial Manual
.. contents::
:backlinks: top
:class: htmlonly
Synopsis
========
.. include:: ../mercurial/help/config.txt
Author
======
Bryan O'Sullivan <bos@serpentine.com>.
Mercurial was written by Matt Mackall <mpm@selenic.com>.
See Also
========
|hg(1)|_, |hgignore(5)|_
Copying
=======
This manual page is copyright 2005 Bryan O'Sullivan.
Mercurial is copyright 2005-2012 Matt Mackall.
Free use of this software is granted under the terms of the GNU General
Public License version 2 or any later version.
.. include:: common.txt