##// END OF EJS Templates
copies: move from a copy on branchpoint to a copy on write approach...
copies: move from a copy on branchpoint to a copy on write approach Before this changes, any branch points results in a copy of the dictionary containing the copy information. This can be very costly for branchy history with few rename information. Instead, we take a "copy on write" approach. Copying the input data only when we are about to update them. In practice we where already doing the copying in half of these case (because `_chain` makes a copy), so we don't add a significant cost here even in the linear case. However the speed up in branchy case is very significant. Here are some timing on the pypy repository. revision: large amount; added files: large amount; rename small amount; c3b14617fbd7 9ba6ab77fd29 before: ! wall 1.399863 comb 1.400000 user 1.370000 sys 0.030000 (median of 10) after: ! wall 0.766453 comb 0.770000 user 0.750000 sys 0.020000 (median of 11) revision: large amount; added files: small amount; rename small amount; c3b14617fbd7 f650a9b140d2 before: ! wall 1.876748 comb 1.890000 user 1.870000 sys 0.020000 (median of 10) after: ! wall 1.167223 comb 1.170000 user 1.150000 sys 0.020000 (median of 10) revision: large amount; added files: large amount; rename large amount; 08ea3258278e d9fa043f30c0 before: ! wall 0.242457 comb 0.240000 user 0.240000 sys 0.000000 (median of 39) after: ! wall 0.211476 comb 0.210000 user 0.210000 sys 0.000000 (median of 45) revision: small amount; added files: large amount; rename large amount; df6f7a526b60 a83dc6a2d56f before: ! wall 0.013193 comb 0.020000 user 0.020000 sys 0.000000 (median of 224) after: ! wall 0.013290 comb 0.010000 user 0.010000 sys 0.000000 (median of 222) revision: small amount; added files: large amount; rename small amount; 4aa4e1f8e19a 169138063d63 before: ! wall 0.001673 comb 0.000000 user 0.000000 sys 0.000000 (median of 1000) after: ! wall 0.001677 comb 0.000000 user 0.000000 sys 0.000000 (median of 1000) revision: small amount; added files: small amount; rename small amount; 4bc173b045a6 964879152e2e before: ! wall 0.000119 comb 0.000000 user 0.000000 sys 0.000000 (median of 8023) after: ! wall 0.000119 comb 0.000000 user 0.000000 sys 0.000000 (median of 7997) revision: medium amount; added files: large amount; rename medium amount; c95f1ced15f2 2c68e87c3efe before: ! wall 0.201898 comb 0.210000 user 0.200000 sys 0.010000 (median of 48) after: ! wall 0.167415 comb 0.170000 user 0.160000 sys 0.010000 (median of 58) revision: medium amount; added files: medium amount; rename small amount; d343da0c55a8 d7746d32bf9d before: ! wall 0.036820 comb 0.040000 user 0.040000 sys 0.000000 (median of 100) after: ! wall 0.035797 comb 0.040000 user 0.040000 sys 0.000000 (median of 100) The extra cost in the linear case can be reclaimed later with some extra logic. Differential Revision: https://phab.mercurial-scm.org/D7124
marmoute -
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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="https://mercurial-scm.org/">Mercurial web site.
You can also download a free book, <a<br /> href="https://book.mercurial-scm.org/">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="https://mercurial-scm.org/wiki/MergeProgram">MergeProgram
on the Mercurial Wiki for more information)



Reporting problems




Before you report any problems, please consult the <a<br /> href="https://mercurial-scm.org/">Mercurial web site
and see if your question is already in our list of <a<br /> href="https://mercurial-scm.org/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@mercurial-scm.org">mercurial@mercurial-scm.org.
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 2005-2019 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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