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Browse source 
and update changelog with benchmark results
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Joey Hess 2020-07-06 13:39:42 -04:00
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commit dfa1c21b8a
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CHANGELOG
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@ -24,7 +24,7 @@ git-annex (8.20200618) UNRELEASED; urgency=medium
* Fix reversion that broke passing annex.* and remote.*.annex-*
git configs with -c. (Since version 8.20200330.)
* Bring back git-annex branch read cache. This speeds up some operations;
git-annex sync --content gets up to 3x faster.
git-annex sync --content --all gets 20% faster.
-- Joey Hess <id@joeyh.name> Thu, 18 Jun 2020 12:21:14 -0400

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doc/todo/speed_up_git_annex_sync_--content_--all/comment_9_c723aacf622de83477a424ebcb3a444a._comment Normal file
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@ -0,0 +1,18 @@
[[!comment format=mdwn
username="joey"
subject="""comment 9"""
date="2020-07-06T16:23:07Z"
content="""
Cache brought back in [[!commit e72ec8b9b23346c4b741a071e9edae4460b233c9]].
Benchmarking git-annex sync --content (w/o --all) with 10k files, there
was very little change, it's only 0.4% faster. With --all, it's 20% faster.
That's kind of weird, because w/o --all it was doing 3 redundant queries,
and --all only adds one more. The first result makes me think that a) git
cat-file is doing its own caching or takes good advantage of disk cache and
b) roundtrip time communicating with it does not seem significant so
--buffer would not be much of an improvement. But the second result muddies
the waters, and I guess it would still be worth trying the --buffer
optimisation.
"""]]