how fast is Python?
Neil Padgen
neil.padgen at mon.bbc.co.uk
Thu Aug 21 16:22:01 CEST 2003
On Wednesday 20 August 2003 21:19, Irmen de Jong wrote:
> Investigate Psyco.
On the strength of this thread, I investigated Psyco. Results of a
very quick investigation with the following program:
-----------------------------------------
def calcPi(iterations):
pi4 = 1.0
for i in xrange(1, iterations):
denominator = (4*i)-1
pi4 = pi4 - 1.0/denominator + 1.0/(denominator+2)
return pi4 * 4.0
def timethis(func, funcName):
import sys
try:
i = int(sys.argv[1])
except:
i = 1000000
import time
start = time.time()
pi = func(i)
end = time.time()
print "%s calculated pi as %s in %s seconds" % (funcName, pi, end
- start)
def main():
timethis(calcPi, 'calcPi')
timethis(speedyPi, 'speedyPi')
import psyco
speedyPi = psyco.proxy(calcPi)
if __name__ == '__main__':
main()
-----------------------------------------
produced the following results on a 1.7GHz P4 running FreeBSD 4.8:
> python2.2 pi.py
calcPi calculated pi as 3.14159315359 in 3.87623202801 seconds
speedyPi calculated pi as 3.14159315359 in 0.790405035019 seconds
-- Neil
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