Mercurial > hg
annotate mercurial/helptext/extensions.txt @ 50317:af776c3d5c3e stable
debugdeltachain: stop summing the same chain over and over
Before this patch, delta chain size was computed from scratch for each chain,
disregarding the fact very likely already computed the same of length-1 prefix
for another revisions.
We not cache delta chain size and shortcut the computation when we see them.
Just for my mercurial-devel clone, this move the computation from about 17.5
second to about 4.8 seconds.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 21 Mar 2023 15:44:38 +0000 |
parents | 2e017696181f |
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1 Mercurial has the ability to add new features through the use of |
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2 extensions. Extensions may add new commands, add options to |
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3 existing commands, change the default behavior of commands, or |
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4 implement hooks. |
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5 |
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6 To enable the "foo" extension, either shipped with Mercurial or in the |
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7 Python search path, create an entry for it in your configuration file, |
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8 like this:: |
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9 |
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10 [extensions] |
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11 foo = |
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12 |
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13 You may also specify the full path to an extension:: |
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14 |
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15 [extensions] |
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16 myfeature = ~/.hgext/myfeature.py |
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17 |
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18 See :hg:`help config` for more information on configuration files. |
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19 |
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20 Extensions are not loaded by default for a variety of reasons: |
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21 they can increase startup overhead; they may be meant for advanced |
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22 usage only; they may provide potentially dangerous abilities (such |
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23 as letting you destroy or modify history); they might not be ready |
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24 for prime time; or they may alter some usual behaviors of stock |
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25 Mercurial. It is thus up to the user to activate extensions as |
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26 needed. |
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27 |
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28 To explicitly disable an extension enabled in a configuration file of |
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29 broader scope, prepend its path with !:: |
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30 |
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31 [extensions] |
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32 # disabling extension bar residing in /path/to/extension/bar.py |
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33 bar = !/path/to/extension/bar.py |
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34 # ditto, but no path was supplied for extension baz |
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35 baz = ! |