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Re: Replace, ReplaceAll and If time performace comparition

• To: mathgroup at smc.vnet.net
• Subject: [mg127096] Re: Replace, ReplaceAll and If time performace comparition
• From: awnl <awnl at gmx-topmail.de>
• Date: Sat, 30 Jun 2012 05:16:14 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201206240826.EAA08423@smc.vnet.net> <201206250801.EAA15438@smc.vnet.net> <jseetb$i34$1@smc.vnet.net> <201206280802.EAA29098@smc.vnet.net> <jsjq44$ct6$1@smc.vnet.net>

Hi,


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

It looks like yes. What you should have in mind is that Compile does 
transform Mathematica code to something else (with CompilationTarget -> 
"C" to C). The speedup depends a lot on how well optimized the generated 
code is. I think the general rule is that constructs which are less 
general and easier to analyze will be easier to optimize and thus have a 
greater chance to be translated to something efficient.

As we don't know which transformation rules the code generator uses, it 
will always need some experimenting, though.

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>