Sped up query commands that read the git-annex branch by around 5%

The only price paid is one additional MVar read per write to the journal.
Presumably writing a journal file dominiates over a MVar read time by
several orders of magnitude.

--batch does not get the speedup because then it needs to notice when
another process has made a change. Also made the assistant and other damon
modes bypass the optimisation, which would not help them anyway.
This commit is contained in:
Joey Hess 2020-04-09 13:54:43 -04:00
parent aba905152a
commit aeca7c2207
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14 changed files with 101 additions and 25 deletions

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@ -90,7 +90,7 @@ knownUrls = do
{- Ensure the git-annex branch's index file is up-to-date and
- any journaled changes are reflected in it, since we're going
- to query its index directly. -}
Annex.Branch.update
_ <- Annex.Branch.update
Annex.Branch.commit =<< Annex.Branch.commitMessage
Annex.Branch.withIndex $ do
top <- fromRepo Git.repoPath