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| author | Ludovic Courtès <ludo@gnu.org> | 2015-03-28 21:44:01 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2021-02-23 15:24:48 +0100 |
| commit | bde7929bd06196ed84f96d08676ee43da4685975 (patch) | |
| tree | 5ed74de15d7a1fd8b3a2180aa99e9e6ccc465a4b | |
| parent | 70b33d8898031d0f8623922762442f4abf6adcc4 (diff) | |
| download | guix-bde7929bd06196ed84f96d08676ee43da4685975.tar.gz | |
gexp: Micro-optimize sexp serialization.
* guix/gexp.scm (sexp->string): New procedure. (gexp->derivation): Use it instead of 'object->string'.
| -rw-r--r-- | guix/gexp.scm | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/guix/gexp.scm b/guix/gexp.scm index 764c89a187..8dd824c512 100644 --- a/guix/gexp.scm +++ b/guix/gexp.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org> ;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org> ;;; Copyright © 2019, 2020 Mathieu Othacehe <m.othacehe@gmail.com> @@ -941,6 +941,15 @@ second element is the derivation to compile them." modules system extensions guile deprecation-warnings module-path)) +(define (sexp->string sexp) + "Like 'object->string', but deterministic and slightly faster." + ;; Explicitly use UTF-8 for determinism, and also because UTF-8 output is + ;; faster. + (with-fluids ((%default-port-encoding "UTF-8")) + (call-with-output-string + (lambda (port) + (write sexp port))))) + (define* (lower-gexp exp #:key (module-path %load-path) @@ -1159,7 +1168,7 @@ The other arguments are as for 'derivation'." (return #f))) (guile -> (lowered-gexp-guile lowered)) (builder (text-file script-name - (object->string + (sexp->string (lowered-gexp-sexp lowered))))) (mbegin %store-monad (set-grafting graft?) ;restore the initial setting |