Created
July 17, 2011 12:19
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Logistic map iteration timings
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"Logistic map iteration timing" | |
from itertools import islice | |
import time | |
import main | |
def logistic_map(r, x): | |
assert r > 0, 'R must be a positive number' | |
assert 0 < x < 1, 'X must be a number between 0 and 1' | |
while True: | |
x = r * x * (1 - x) | |
yield x | |
if main.executed(): | |
times = [] | |
minimum = Ellipsis | |
maximum = None | |
iterator = logistic_map(3.65, 0.01) | |
for loop in xrange(15): | |
start = time.clock() | |
for x in islice(iterator, 500): | |
minimum = min(minimum, x) | |
maximum = max(maximum, x) | |
stop = time.clock() | |
times.append(stop - start) | |
print "Iteration times" | |
print ",".join(str(i) for i in times) | |
print "X range" | |
print minimum, maximum |
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[aliles@macbookpro ~]$ pypy chaos.py | |
Iteration times | |
0.001396,0.001507,0.014415,0.000177,0.000169,0.000174,0.000168,0.000168,0.000211,0.000182,0.000169,0.000172,0.000175,0.000168,0.000169 | |
X range | |
0.036135 0.912499995154 | |
[aliles@macbookpro ~]$ python2.7 chaos.py | |
Iteration times | |
0.000584,0.000558,0.000558,0.000556,0.000564,0.000559,0.000555,0.000556,0.000558,0.000556,0.000557,0.000569,0.000556,0.000561,0.000558 | |
X range | |
0.036135 0.912499995154 |
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