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gnu: python: Enable optimizations.

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As a result, python execution time of scripts is decreased by 6 to 40%.

gnu/packages/python (python-2.7)[arguments]: Add configure and make flags to
optimize the resulting python.
This commit is contained in:
Julien Lepiller 2021-03-18 23:41:40 +01:00
parent 20d52562e5
commit 99d450b085
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1 changed files with 9 additions and 1 deletions
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10
gnu/packages/python.scm
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@ -184,7 +184,10 @@ (define-public python-2.7
"--with-system-expat" ;for XML support
"--with-system-ffi" ;build ctypes
"--with-ensurepip=install" ;install pip and setuptools
"--with-computed-gotos" ;main interpreter loop optimization
"--with-lto" ;increase size by 20MB, but 15% speedup
"--enable-unicode=ucs4"
"--enable-optimizations"
;; Prevent the installed _sysconfigdata.py from retaining a reference
;; to coreutils.
@ -198,8 +201,13 @@ (define-public python-2.7
"ac_cv_file__dev_ptmx=no"
"ac_cv_file__dev_ptc=no")
'())
;; -fno-semantic-interposition reinstates some optimizations by gcc
;; leading to around 15% speedup. This is the default starting from
;; python 3.10.
"CFLAGS=-fno-semantic-interposition"
(string-append "LDFLAGS=-Wl,-rpath="
(assoc-ref %outputs "out") "/lib"))
(assoc-ref %outputs "out") "/lib"
" -fno-semantic-interposition"))
;; With no -j argument tests use all available cpus, so provide one.
#:make-flags
(list (string-append