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doubled speed with esqeleto

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Joey Hess 2014-03-13 11:09:05 -04:00
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doc/design/caching_database.mdwn
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@ -18,6 +18,9 @@ generated and updated by looking at the git repository.
"regenerated" by running fsck again. "regenerated" by running fsck again.
(Perhaps doesn't quite fit, but let it slide..) (Perhaps doesn't quite fit, but let it slide..)
Store in the database the Ref of the branch that was used to construct it.
(Update in same transaction as cached data.)
## case study: persistent with sqllite ## case study: persistent with sqllite
Here's a non-normalized database schema in persistent's syntax. Here's a non-normalized database schema in persistent's syntax.
@ -93,6 +96,10 @@ With this, 1000 queries takes 0.406s. Note that persistent is probably not
actually doing a join at the SQL level, so this could be sped up using actually doing a join at the SQL level, so this could be sped up using
eg, esquelito. eg, esquelito.
Update2: Using esquelito to do a join got this down to 0.250s.
Code: <http://lpaste.net/101141> <http://lpaste.net/101142>
Compare the above with 1000 calls to `associatedFiles`, which is approximately Compare the above with 1000 calls to `associatedFiles`, which is approximately
as fast as just opening and reading 1000 files, so will take well under as fast as just opening and reading 1000 files, so will take well under
0.05s with a **cold** cache. 0.05s with a **cold** cache.