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Re: Replace, ReplaceAll and If time performace comparition

• To: mathgroup at smc.vnet.net
• Subject: [mg127079] Re: Replace, ReplaceAll and If time performace comparition
• From: Christoph Lhotka <christoph.lhotka at fundp.ac.be>
• Date: Fri, 29 Jun 2012 04:48:09 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201206240826.EAA08423@smc.vnet.net> <201206250801.EAA15438@smc.vnet.net> <jseetb$i34$1@smc.vnet.net> <201206280802.EAA29098@smc.vnet.net>

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
>

• References:
  • Replace, ReplaceAll and If time performace comparition
    • From: Murta <rodrigomurtax@gmail.com>
  • Re: Replace, ReplaceAll and If time performace comparition
    • From: Andrzej Kozlowski <akozlowski@gmail.com>
  • Re: Replace, ReplaceAll and If time performace comparition
    • From: awnl <awnl@gmx-topmail.de>