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branches: improve performance by removing redundant operations...
branches: improve performance by removing redundant operations This refactors the branches command so it collects all the information it needs about a branch in one pass over the branch map. In particular, it fixes an issue where the command called repo.branchtags() to get branch tips, and then used repo.branchheads() to get the closed/open status. Both repo methods read the changelog to determine if the branch is closed, resulting in extra, redundant I/O. For the PyPy repo with 744 branches and 843 branch heads, this brings hg branches over NFS from: CallCount Recursive Total(ms) Inline(ms) module:lineno(function) 2427 0 0.9057 0.9057 <open> 2424 0 0.4096 0.4096 <method 'close' of 'file' objects> 2424 0 0.0476 0.0476 <method 'read' of 'file' objects> 1 0 0.0468 0.0468 mercurial.revlog:637(headrevs) +1 0 0.0000 0.0000 +<len> 2422 0 0.0443 0.0443 <method 'seek' of 'file' objects> 2962 0 0.0337 0.0337 <zlib.decompress> 2491 0 1.8008 0.0322 mercurial.changelog:182(read) +2491 0 1.6982 0.0315 +mercurial.revlog:881(revision) +2488 0 0.0269 0.0134 +mercurial.changelog:28(decodeextra) +4982 0 0.0085 0.0085 +<method 'split' of 'str' objects> +4982 0 0.0274 0.0049 +mercurial.encoding:61(tolocal) +2491 0 0.0039 0.0039 +<method 'index' of 'str' objects> 2491 0 1.6982 0.0315 mercurial.revlog:881(revision) +2413 0 0.0112 0.0112 +mercurial.revlog:305(rev) +2491 0 1.5315 0.0068 +mercurial.revlog:847(_chunkraw) +2491 0 0.0414 0.0058 +mercurial.revlog:945(_checkhash) +2491 0 0.0028 0.0028 +mercurial.revlog:349(flags) +2491 0 0.0025 0.0025 +<mercurial.mpatch.patches> 2422 0 1.5089 0.0286 mercurial.revlog:818(_loadchunk) +2422 0 0.4093 0.4093 +<method 'close' of 'file' objects> +2422 0 0.0451 0.0451 +<method 'read' of 'file' objects> +2422 0 0.0443 0.0443 +<method 'seek' of 'file' objects> +2422 0 0.9703 0.0096 +mercurial.store:374(__call__) +2422 0 0.0079 0.0069 +mercurial.revlog:810(_addchunk) 5804 0 0.0204 0.0204 mercurial.revlog:305(rev) 2426 0 0.9552 0.0177 mercurial.scmutil:218(__call__) +2426 0 0.9057 0.9057 +<open> +2426 0 0.0120 0.0083 +os.path:80(split) +2426 0 0.0061 0.0049 +mercurial.scmutil:92(__call__) Time: real 1.950 secs (user 0.560+0.000 sys 0.220+0.000) down to: CallCount Recursive Total(ms) Inline(ms) module:lineno(function) 1545 0 0.6035 0.6035 <open> 1542 0 0.2697 0.2697 <method 'close' of 'file' objects> 1 0 0.0547 0.0547 mercurial.revlog:637(headrevs) +1 0 0.0000 0.0000 +<len> 1542 0 0.0389 0.0389 <method 'read' of 'file' objects> 1540 0 0.0316 0.0316 <method 'seek' of 'file' objects> 1853 0 0.0227 0.0227 <zlib.decompress> 1557 0 1.2131 0.0226 mercurial.changelog:182(read) +1557 0 1.1398 0.0221 +mercurial.revlog:881(revision) +1555 0 0.0199 0.0094 +mercurial.changelog:28(decodeextra) +3114 0 0.0058 0.0058 +<method 'split' of 'str' objects> +3114 0 0.0196 0.0035 +mercurial.encoding:61(tolocal) +1557 0 0.0026 0.0026 +<method 'index' of 'str' objects> 1557 0 1.1398 0.0221 mercurial.revlog:881(revision) +1557 0 1.0307 0.0047 +mercurial.revlog:847(_chunkraw) +1557 0 0.0287 0.0040 +mercurial.revlog:945(_checkhash) +1557 0 0.0018 0.0018 +<mercurial.mpatch.patches> +1557 0 0.0018 0.0018 +mercurial.revlog:326(node) +1557 0 0.0417 0.0013 +mercurial.revlog:857(_chunkbase) 1540 0 1.0147 0.0210 mercurial.revlog:818(_loadchunk) +1540 0 0.2693 0.2693 +<method 'close' of 'file' objects> +1540 0 0.0360 0.0360 +<method 'read' of 'file' objects> +1540 0 0.0316 0.0316 +<method 'seek' of 'file' objects> +1540 0 0.6487 0.0070 +mercurial.store:374(__call__) +1540 0 0.0059 0.0052 +mercurial.revlog:810(_addchunk) 3192 0 0.0173 0.0173 mercurial.revlog:305(rev) 8184 0 0.0300 0.0147 <method 'decode' of 'str' objects> +5204 0 0.0149 0.0048 +encodings.utf_8:15(decode) +1 0 0.0004 0.0000 +encodings:71(search_function) 43 26 0.0147 0.0129 <__import__> Time: real 1.390 secs (user 0.450+0.000 sys 0.170+0.000)
Martin Geisler - - Load All Authors

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hgweb.txt
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Mercurial's internal web server, hgweb, can serve either a single
repository, or a collection of them. In the latter case, a special
configuration file can be used to specify the repository paths to use
and global web configuration options.
This file uses the same syntax as other Mercurial configuration files,
but only the following sections are recognized:
- web
- paths
- collections
The ``web`` section can specify all the settings described in the web
section of the hgrc(5) documentation. See :hg:`help config` for
information on where to find the manual page.
The ``paths`` section provides mappings of physical repository
paths to virtual ones. For instance::
[paths]
projects/a = /foo/bar
projects/b = /baz/quux
web/root = /real/root/*
/ = /real/root2/*
virtual/root2 = /real/root2/**
- The first two entries make two repositories in different directories
appear under the same directory in the web interface
- The third entry maps every Mercurial repository found in '/real/root'
into 'web/root'. This format is preferred over the [collections] one,
since using absolute paths as configuration keys is not supported on every
platform (especially on Windows).
- The fourth entry is a special case mapping all repositories in
'/real/root2' in the root of the virtual directory.
- The fifth entry recursively finds all repositories under the real
root, and maps their relative paths under the virtual root.
The ``collections`` section provides mappings of trees of physical
repositories paths to virtual ones, though the paths syntax is generally
preferred. For instance::
[collections]
/foo = /foo
Here, the left side will be stripped off all repositories found in the
right side. Thus ``/foo/bar`` and ``foo/quux/baz`` will be listed as
``bar`` and ``quux/baz`` respectively.