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ui: Have 'guix help' stat less. 

This reduces the number of syscalls for:

  env -i $(type -P strace) -c $(type -P guix) help

from 4.3K to 2.2K, thereby reducing startup time.

Reported by Julien Lepiller.

* guix/ui.scm (run-guix-command): Move %FILE-PORT-NAME-CANONICALIZATION
to...
(run-guix): ... here.
This commit is contained in:
Ludovic Courtès 2021-06-28 22:52:16 +02:00
parent e059adcb60
commit ab37731a8d
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GPG Key ID: 090B11993D9AEBB5
1 changed files with 32 additions and 32 deletions
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64
guix/ui.scm
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@ -2139,16 +2139,14 @@ found."
(let ((command-main (module-ref module
(symbol-append 'guix- command))))
(parameterize ((program-name command))
;; Disable canonicalization so we don't don't stat unreasonably.
(with-fluids ((%file-port-name-canonicalization #f))
(dynamic-wind
(const #f)
(lambda ()
(apply command-main args))
(lambda ()
;; Abuse 'exit-hook' (which is normally meant to be used by the
;; REPL) to run things like profiling hooks upon completion.
(run-hook exit-hook)))))))
(dynamic-wind
(const #f)
(lambda ()
(apply command-main args))
(lambda ()
;; Abuse 'exit-hook' (which is normally meant to be used by the
;; REPL) to run things like profiling hooks upon completion.
(run-hook exit-hook))))))
(define (run-guix . args)
"Run the 'guix' command defined by command line ARGS.
@ -2160,28 +2158,30 @@ and signal handling have already been set up."
;; number of 'stat' calls per entry in %LOAD-PATH. Shamelessly remove it.
(set! %load-extensions '(".scm"))
(match args
(()
(format (current-error-port)
(G_ "guix: missing command name~%"))
(show-guix-usage))
((or ("-h") ("--help"))
(leave-on-EPIPE (show-guix-help)))
((or ("-V") ("--version"))
(show-version-and-exit "guix"))
(((? option? o) args ...)
(format (current-error-port)
(G_ "guix: unrecognized option '~a'~%") o)
(show-guix-usage))
(("help" command)
(apply run-guix-command (string->symbol command)
'("--help")))
(("help" args ...)
(leave-on-EPIPE (show-guix-help)))
((command args ...)
(apply run-guix-command
(string->symbol command)
args))))
;; Disable canonicalization so we don't don't stat unreasonably.
(with-fluids ((%file-port-name-canonicalization #f))
(match args
(()
(format (current-error-port)
(G_ "guix: missing command name~%"))
(show-guix-usage))
((or ("-h") ("--help"))
(leave-on-EPIPE (show-guix-help)))
((or ("-V") ("--version"))
(show-version-and-exit "guix"))
(((? option? o) args ...)
(format (current-error-port)
(G_ "guix: unrecognized option '~a'~%") o)
(show-guix-usage))
(("help" command)
(apply run-guix-command (string->symbol command)
'("--help")))
(("help" args ...)
(leave-on-EPIPE (show-guix-help)))
((command args ...)
(apply run-guix-command
(string->symbol command)
args)))))
(define (guix-main arg0 . args)
(initialize-guix)