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use ByteString for git config

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The parser and looking up config keys in the map should both be faster
due to using ByteString.

I had hoped this would speed up startup time, but any improvement to
that was too small to measure. Seems worth keeping though.

Note that the parser breaks up the ByteString, but a config map ends up
pointing to the config as read, which is retained in memory until every
value from it is no longer used. This can change memory usage
patterns marginally, but won't affect git-annex.
This commit is contained in:
Joey Hess 2019-11-27 16:54:11 -04:00
parent 37d0f73e66
commit d7833def66
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doc/todo/optimize_by_converting_String_to_ByteString.mdwn
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@ -29,5 +29,3 @@ the `bs` branch has quite a lot of things still needing work, including:
avoiding a conversion. Note that these are only available on unix, not
windows, so a compatability shim will be needed.
(I can't seem to find any library that provides one.)
* Use ByteString for parsing git config to speed up startup.