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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Replace, ReplaceAll and If time performace comparition
Replies: 13   Last Post: Jul 14, 2012 1:31 AM

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Christoph Lhotka

Posts: 39
Registered: 2/9/12
Re: Replace, ReplaceAll and If time performace comparition
Posted: Jun 29, 2012 4:48 AM
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Hi,

congratulations!

It strikes the performance of Clip on my machine by a factor of 2
(instead of
a factor of 1.45 as published in my previous post).

Does it mean, that Compile + Map + raw functions is a good combination
to speed up codes?


Question: Can anyone explain, why RuntimeOptions->"Speed" does not
improve the performance?


Thanks for your code,

Christoph



On 06/28/2012 10:02 AM, awnl wrote:
> Hi,
>
>> Can anyone top the result?
> contradicting to my announcement, I tried anyway and found this to be
> considerably faster on my machine:
>
> cf3 = Compile[{{list, _Integer, 1}},
> Map[If[# > 0, #, 0] &, list],
> CompilationTarget -> "C"
> ]
>
> hth,
>
> albert
>

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