Re: [IronPython] Sin and Sqrt performance (Chris Trimble)

[Dave]

Use xrange instead of range and there should be a pretty good performance improvement;) As is, your for loop creates a list of five million elements. A simple while loop would also do the trick although it's not as clean to look at.

Dave

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Today's Topics:

1. Sin and Sqrt performance (Chris Trimble)


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Message: 1
Date: Mon, 17 Apr 2006 11:47:35 -0700
From: "Chris Trimble" <[EMAIL PROTECTED]>
Subject: [IronPython] Sin and Sqrt performance
To: "Discussion of IronPython"
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1

IP doesn't do much better than CPython when using math.sin and
math.sqrt. However, same test in C# dominates (10ms.. as opposed to
upwards of 5 seconds in IP or CPy). Am I missing something here?

Thanks,

- Chris

-----------------------------------

import time
from math import *

def do_timing(f, reps):
start = time.time()
f(reps)
end = time.time()
print "%s (%d reps): %f" % (f.__name__, reps, end-start)


def py_fpfunc_test(reps):
j = 0.0
for i in range(0, reps):
j += sin( j )
j += sqrt( j )
j +=2.72392032032;
print j

def do_all_timing():
do_timing(py_fpfunc_test, 5000000)

do_all_timing()
print ""


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