Re: [BLACKBOX] INTEGER arithmetic speed

From: [at]} <Bernhard>
Date: Wed, 19 Oct 2011 18:03:58 +0200

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> I have developed an algorithm that uses LONGINTs, and for a particular
> input takes 3.5 minutes to run.
>
> I don't always need such large numbers, so I cut-and-pasted an INTEGER
> version, which gives the same results for this input, but takes 5 minutes.

> Is this a freak result (maybe to do with cache boundaries or something),
> or is it a general situation that INTEGER arithmetic is 50% slower
> than LONGINT arithmetic

just a wild guess: afaik LONGINT arithmetik in BlackBox is handled by
the FPU in contrast to INTEGERs ...

regards
    Bernhard

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Received on Wed Oct 19 2011 - 18:03:58 UTC