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store: Micro-optimize object cache lookup. 

This avoids a closure allocation when 'lookup-cached-object' is called.

* guix/store.scm (lookup-cached-object): Avoid optional/keyword
arguments and inline.
(%mcached): Adjust accordingly.
This commit is contained in:
Ludovic Courtès 2021-02-19 22:30:30 +01:00
parent fcde4e10b8
commit 0a912b3a43
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GPG Key ID: 090B11993D9AEBB5
1 changed files with 2 additions and 3 deletions
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guix/store.scm
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@ -1863,8 +1863,7 @@ and RESULT is typically its derivation."
(lambda (x y)
#t)))
(define* (lookup-cached-object object #:optional (keys '())
#:key (vhash-fold* vhash-foldq*))
(define-inlinable (lookup-cached-object object keys vhash-fold*)
"Return the cached object in the store connection corresponding to OBJECT
and KEYS; use VHASH-FOLD* to look for OBJECT in the cache. KEYS is a list of
additional keys to match against, and which are compared with 'equal?'.
@ -1895,7 +1894,7 @@ Return #f on failure and the cached result otherwise."
OBJECT/KEYS, or return its cached value. Use VHASH-CONS to insert OBJECT into
the cache, and VHASH-FOLD* to look it up."
(mlet %store-monad ((cached (lookup-cached-object object keys
#:vhash-fold* vhash-fold*)))
vhash-fold*)))
(if cached
(return cached)
(>>= (mthunk)