81d402216d
This will speed up the common case where a Key is deserialized from disk, but is then serialized to build eg, the path to the annex object. Previously attempted in4536c93bb2and reverted in96aba8eff7. The problems mentioned in the latter commit are addressed now: Read/Show of KeyData is backwards-compatible with Read/Show of Key from before this change, so Types.Distribution will keep working. The Eq instance is fixed. Also, Key has smart constructors, avoiding needing to remember to update the cached serialization. Used git-annex benchmark: find is 7% faster whereis is 3% faster get when all files are already present is 5% faster Generally, the benchmarks are running 0.1 seconds faster per 2000 files, on a ram disk in my laptop.
39 lines
851 B
Haskell
39 lines
851 B
Haskell
{- git-annex "URL" backend -- keys whose content is available from urls.
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-
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- Copyright 2011 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Backend.URL (
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backends,
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fromUrl
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) where
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import Annex.Common
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import Types.Key
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import Types.Backend
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import Backend.Utilities
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backends :: [Backend]
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backends = [backend]
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backend :: Backend
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backend = Backend
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{ backendVariety = URLKey
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, getKey = \_ _ -> return Nothing
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, verifyKeyContent = Nothing
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, canUpgradeKey = Nothing
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, fastMigrate = Nothing
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-- The content of an url can change at any time, so URL keys are
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-- not stable.
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, isStableKey = const False
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}
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{- Every unique url has a corresponding key. -}
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fromUrl :: String -> Maybe Integer -> Key
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fromUrl url size = mkKey $ \k -> k
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{ keyName = genKeyName url
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, keyVariety = URLKey
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, keySize = size
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}
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