[IronPython] Looping in IronPython - should it be linear?
steve.chadwick at gmail.com
Thu Feb 15 14:11:35 CET 2007
Sorry - here is the code that I am using to generate the loop time.
def RunExperiment1(self, loopInterationValue): #counting up
print "Exp 1: Counting Up, the loop value is ",
for i in range(0, self.m_ExpRuns):
outer_loop = 5
# Start block of interest
start_time = time.time()
for j in range(0,outer_loop):
for k in range(0, loopInterationValue):
1 #empty loop
end_time = time.time()
mean = (end_time - start_time)/(outer_loop*1.0)
# End block of interest
# Write output via the base class (assign to mod variables)
self.m_Mean = mean
self.m_label_desc = "Loop_Counting_Up"
self.m_LabelValue = loopInterationValue
self.write_results() #via base class
From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Robert Wierschke
Sent: Thursday, February 15, 2007 1:37 AM
To: Discussion of IronPython
Subject: Re: [IronPython] Looping in IronPython - should it be linear?
Please post the code of your loop.
Do you instantiate objectn in your loop? I guess the memory management /
garbage collection is responsible for the additional required time.
Also the code runs in the .NET VM and the VM might do other things as well
(JIT compilation, ...).
-------- Original-Nachricht --------
Datum: Wed, 14 Feb 2007 20:43:36 -0700
Von: "Steve Chadwick" <steve.chadwick at gmail.com>
An: "\'Discussion of IronPython\'" <users at lists.ironpython.com>
Betreff: [IronPython] Looping in IronPython - should it be linear?
> I am new to IP, and I have a silly post. I am sure that
> someone might be able to help me understand what is happening here (I
> am truly impressed with the technical depth of this forum). In trying
> to learn the language, one of the things I do is just run a quick
> looping experiment and measure the time it takes to execute N
> iterations. Up to this point, I have always gotten a trend that is
> linear, which makes sense.
> However, the below graph isn't linear, and I am puzzled as to why.
> The graph seems to suggest that the distribution has an exponential
> component to it. I have tested this on a couple of windows systems
> and this wasn't a fluke. Granted, the version of IP that I am using
> isn't the latest/greatest, but regardless of versioning, I am trying
> to understand the mechanism. Thanks for any thoughts, and my
> apologies if this turns out to be a silly post.
> Steve Chadwick
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