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revset: improve performance of _generatorset.__contains__ (issue 4201)...
revset: improve performance of _generatorset.__contains__ (issue 4201) _generatorset.__contains__ and __contains__ from child classes were calling into __iter__ to look for values. Since all previously-encountered values from the generator were cached and checked in __contains__ before this iteration, __contains__ was effectively performing iteration busy work which could lead to an explosion of redundant work. This patch changes __contains__ to be more intelligent. Instead of looking at all values via __iter__, __contains__ will instead go straight to "new" values from the underlying generator. On a clone of the Firefox repository with around 200,000 changesets, this patch decreases the execution time of the revset '::(200067)::' from ~100s to ~4s on the author's machine. Rebase operations (which use the aforementioned revset), speed up accordingly.
Gregory Szorc -
r20828:3210b793 default
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Mercurial for Windows



Welcome to Mercurial for Windows!




Mercurial is a command-line application. You must run it from
the Windows command prompt (or if you're hard core, a <a<br /> href="http://www.mingw.org/">MinGW shell).




Note: the standard http://www.mingw.org/">MinGW
msys startup script uses rxvt which has problems setting up
standard input and output. Running bash directly works
correctly.




For documentation, please visit the <a<br /> href="http://mercurial.selenic.com/">Mercurial web site.
You can also download a free book, <a<br /> href="http://hgbook.red-bean.com/">Mercurial: The Definitive
Guide.




By default, Mercurial installs to C:\Program
Files\Mercurial
. The Mercurial command is called
hg.exe.



Testing Mercurial after you've installed it




The easiest way to check that Mercurial is installed properly is
to just type the following at the command prompt:




hg



This command should print a useful help message. If it does,
other Mercurial commands should work fine for you.



Configuration notes


Default editor



The default editor for commit messages is 'notepad'. You can set
the EDITOR (or HGEDITOR) environment variable
to specify your preference or set it in mercurial.ini:



[ui]
editor = whatever


Configuring a Merge program



It should be emphasized that Mercurial by itself doesn't attempt
to do a Merge at the file level, neither does it make any
attempt to Resolve the conflicts.




By default, Mercurial will use the merge program defined by the
HGMERGE environment variable, or uses the one defined
in the mercurial.ini file. (see <a<br /> href="http://mercurial.selenic.com/wiki/MergeProgram">MergeProgram
on the Mercurial Wiki for more information)



Reporting problems




Before you report any problems, please consult the <a<br /> href="http://mercurial.selenic.com/">Mercurial web site
and see if your question is already in our list of <a<br /> href="http://mercurial.selenic.com/wiki/FAQ">Frequently
Answered Questions (the "FAQ").




If you cannot find an answer to your question, please feel free
to send mail to the Mercurial mailing list, at <a<br /> href="mailto:mercurial@selenic.com">mercurial@selenic.com.
Remember, the more useful information you include in your
report, the easier it will be for us to help you!




If you are IRC-savvy, that's usually the fastest way to get
help. Go to #mercurial on irc.freenode.net.



Author and copyright information




Mercurial was written by http://www.selenic.com">Matt
Mackall, and is maintained by Matt and a team of volunteers.




The Windows installer was written by <a<br /> href="http://www.serpentine.com/blog">Bryan O'Sullivan.




Mercurial is Copyright 2005-2014 Matt Mackall and others. See
the Contributors.txt file for a list of contributors.




Mercurial is free software; you can redistribute it and/or
modify it under the terms of the <a<br /> href="http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt">GNU
General Public License version 2 or any later version.




Mercurial is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty
of merchantability or fitness for a particular
purpose
. See the GNU General Public License for more
details.


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