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packages: Cache the result of 'package->bag'. 

This reduces the wall-clock time of

  guix environment gnutls --pure -E true

by ~25%.

* guix/packages.scm (%bag-cache): New variable.
(package->bag): Use 'cached' to cache things to %BAG-CACHE.
This commit is contained in:
Ludovic Courtès 2016-03-07 23:52:35 +01:00
parent 198d84b70b
commit 9775412ee0
1 changed files with 38 additions and 29 deletions
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67
guix/packages.scm
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@ -798,41 +798,50 @@ information in exceptions."
(package package)
(input x)))))))
(define %bag-cache
;; 'eq?' cache mapping packages to system+target+graft?-dependent bags.
;; It significantly speeds things up when doing repeated calls to
;; 'package->bag' as is the case when building a profile.
(make-weak-key-hash-table 200))
(define* (package->bag package #:optional
(system (%current-system))
(target (%current-target-system))
#:key (graft? (%graft?)))
"Compile PACKAGE into a bag for SYSTEM, possibly cross-compiled to TARGET,
and return it."
;; Bind %CURRENT-SYSTEM and %CURRENT-TARGET-SYSTEM so that thunked field
;; values can refer to it.
(parameterize ((%current-system system)
(%current-target-system target))
(match (if graft?
(or (package-replacement package) package)
package)
(($ <package> name version source build-system
args inputs propagated-inputs native-inputs self-native-input?
outputs)
(or (make-bag build-system (string-append name "-" version)
#:system system
#:target target
#:source source
#:inputs (append (inputs)
(propagated-inputs))
#:outputs outputs
#:native-inputs `(,@(if (and target self-native-input?)
`(("self" ,package))
'())
,@(native-inputs))
#:arguments (args))
(raise (if target
(condition
(&package-cross-build-system-error
(package package)))
(condition
(&package-error
(package package))))))))))
(cached (=> %bag-cache)
package (list system target graft?)
;; Bind %CURRENT-SYSTEM and %CURRENT-TARGET-SYSTEM so that thunked
;; field values can refer to it.
(parameterize ((%current-system system)
(%current-target-system target))
(match (if graft?
(or (package-replacement package) package)
package)
(($ <package> name version source build-system
args inputs propagated-inputs native-inputs
self-native-input? outputs)
(or (make-bag build-system (string-append name "-" version)
#:system system
#:target target
#:source source
#:inputs (append (inputs)
(propagated-inputs))
#:outputs outputs
#:native-inputs `(,@(if (and target
self-native-input?)
`(("self" ,package))
'())
,@(native-inputs))
#:arguments (args))
(raise (if target
(condition
(&package-cross-build-system-error
(package package)))
(condition
(&package-error
(package package)))))))))))
(define (input-graft store system)
"Return a procedure that, given a package with a graft, returns a graft, and