- To: mathgroup at smc.vnet.net
- Subject: [mg13165] Re: [mg13066] Int.
- From: Sean Ross <seanross at worldnet.att.net>
- Date: Mon, 13 Jul 1998 07:42:15 -0400
- References: <199807042045.QAA02903@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
phpcp at csv.warwick.ac.uk wrote:
> I have a function (Module) for integration using runge-kutta-fehlberg
> algorithm. It seems to run very (very, very) slow. How can I make it
> faster. What operations take the longest in Mathematica?
Mathematica is at its slowest when you use procedural programming: For,
Do, While, Table etc. It is at its fastest when you use functional
proogramming: Map, Thread, Through, Apply, Inner etc. If you can
rewrite your algorithm to use these kinds of functions you will
probably speed up by a factor of 10 or so. After that you can also use
the compile function.
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