Mercurial > public > mercurial-scm > hg
diff mercurial/localrepo.py @ 42046:4ee906aa7b60
compression: introduce an official `format.revlog-compression` option
This option supersedes the `experiment.format.compression` option. The value
currently supported are zlib (default) and zstd (if Mercurial was compiled with
zstd support).
The option gained an explicit reference to `revlog` since this is the target
usage here. Different storage methods might require different compression
strategies.
In our tests, using zstd give a significant CPU usage improvement (both
compression and decompressing) while keeping similar repository size.
Zstd as other interresting mode (dictionnary, pre-text, etc?) that are probably
worth exploring. However, just plain switching from zlib to zstd provide a large
benefit.
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Wed, 27 Mar 2019 18:26:54 +0100 |
| parents | bb271ec2fbfb |
| children | 8de1b5a009ee |
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--- a/mercurial/localrepo.py Tue Apr 02 11:03:46 2019 -0700 +++ b/mercurial/localrepo.py Wed Mar 27 18:26:54 2019 +0100 @@ -2920,10 +2920,10 @@ if ui.configbool('format', 'dotencode'): requirements.add('dotencode') - compengine = ui.config('experimental', 'format.compression') + compengine = ui.config('format', 'revlog-compression') if compengine not in util.compengines: raise error.Abort(_('compression engine %s defined by ' - 'experimental.format.compression not available') % + 'format.revlog-compression not available') % compengine, hint=_('run "hg debuginstall" to list available ' 'compression engines'))