Well, it seems to be the version-printing. Using
subprocess.call([sys.executable, "-c", "pass"])
or "print 42" or other simple commands pypy seems
faster up to 2 times. Not sure care is needed for
speed of --version :)
cheers,
holger
On Thu, Nov 25, 2010 at 20:02 +0100, holger krekel wrote:
> using the following script:
>
> import sys, subprocess
>
> for i in range(1000):
> subprocess.call([sys.executable, "--version"])
>
> i get these results repeatedly:
>
> (0)h...@teta:~/p/pytest$ time python2.7 r.py 2>/dev/null >/dev/null
> real 0m1.885s
> user 0m0.110s
> sys 0m0.480s
>
> (0)h...@teta:~/p/pytest$ time pypy r.py 2>/dev/null >/dev/null
> real 0m8.763s
> user 0m1.730s
> sys 0m2.880s
>
> IOW, pypy seems to be consistently 5-6 times slower on startup.
> Does anybody have explanations why? When we did measurements
> for the Nokia Maemo device pypy was actually much faster IIRC.
>
> holger
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>
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