Article View: pl.comp.lang.python
Article #26655Re: Wydajność jythona (było Re: python vs php - potrzebne argumenty)
From: Marcin Kasperski
Date: Tue, 24 Nov 2009 12:17
Date: Tue, 24 Nov 2009 12:17
57 lines
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3032 bytes
"Jaroslaw Zabiello" <usenet@onet.eu> writes:
> Dla odmiany inny prosty mikrobenchmark. Liczenie ciągu
> Fibonacciego. (...)
>
> def fib(n):
> if n <= 1: return n
> return fib(n - 1) + fib(n - 2)
To jest atak na przepełnienie stosu a nie mikrobenchmark. Porównujmy
jednak jakieś realne przykłady.
Dla następującego kodu:
from timeit import time
def fib(n):
if n <= 1: return n
a, b = 0, 1
for k in range(1,n):
a, b = b, a+b
return b
for i in range(10):
t = time.time()
fib(35000)
print(time.time()-t)
Mam:
$ python fibo_ja.py
0.0581130981445
0.0577919483185
0.0577850341797
0.0576169490814
0.0577661991119
0.0577838420868
0.0576441287994
0.057590007782
0.0577690601349
0.0581040382385
$ jython -J-server fibo_ja.py
0.406999826431
0.238000154495
0.110000133514
0.128999948502
0.111999988556
0.106999874115
0.103999853134
0.0949997901917
0.148000001907
0.0880000591278
PS Realnych przykładów zastosowań, w których jython wypadłby lepiej,
szukałbym w programach wielowątkowych
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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!news.rmf.pl!nf1.ipartners.pl!ipartners.pl!news.internetia.pl!newsfeed.neostrada.pl!nemesis.news.neostrada.pl!atlantis.news.neostrada.pl!news.neostrada.pl!bozon.softax.pl!news From: Marcin Kasperski <Marcin.Kasperski@mekk.waw.pl> Newsgroups: pl.comp.lang.python Subject: Re: Wydajność jythona (było Re: python vs php - potrzebne argumenty) Date: Tue, 24 Nov 2009 13:17:28 +0100 Organization: Mekk Lines: 57 Message-ID: <873a449kx3.fsf@mekk.waw.pl> References: <h83in7$rl3$1@inews.gazeta.pl> <ebb48508-1e60-47a3-87ab-8b4ccebeeba0@a32g2000yqm.googlegroups.com> <op.u3nkjowaeaqjf2@jzabielloosx.dubtilt.local> <17047610-9db9-47fc-9d8f-c476d2009b37@s15g2000yqs.googlegroups.com> <op.u3ore7useaqjf2@macbook-pro-15-zbiru.local> <1ed24c15-19ff-4a55-872c-ed0ecc3302c9@p8g2000yqb.googlegroups.com> <221dc55c-d636-44f1-bf11-c437e392aa69@j19g2000yqk.googlegroups.com> <he7dc2$q7s$1@news.lublin.pl> <3d4aa257-cd86-4220-9917-e7ff6af41193@d5g2000yqm.googlegroups.com> <556ac98b-668b-4b4a-8373-46ed23c0735d@o31g2000vbi.googlegroups.com> <2986fd9f-56a1-41b9-811e-4f27a4b1a8ac@o13g2000vbl.googlegroups.com> <fb102619-d0ae-46de-9078-55561f655075@33g2000vbe.googlegroups.com> <7cf465d2-a344-4a63-9fbc-a8e2d5c72e90@v37g2000vbb.googlegroups.com> <0477cb5d-8df9-4ac6-a8f3-00dd75dc9b61@33g2000vbe.googlegroups.com> <87bpis9qvi.fsf_-_@mekk.waw.pl> <op.u3wc3kddeaqjf2@jzabielloosx.dubtilt.local> <op.u3wdfrm6eaqjf2@jzabielloosx.dubtilt.local> NNTP-Posting-Host: 83.18.189.42 Mime-Version: 1.0 X-Trace: atlantis.news.neostrada.pl 1259065948 22102 83.18.189.42 (24 Nov 2009 12:32:28 GMT) X-Complaints-To: usenet@news.neostrada.pl NNTP-Posting-Date: Tue, 24 Nov 2009 12:32:28 +0000 (UTC) X-Url: http://mekk.waw.pl User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:bVDL0pWPpqm1ljGFZh6IfF43pvk= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit