Hi,
At 05:19 AM 10/25/99 +0200, Robert van der Peijl wrote:
>> Why is there a difference in iteration time between the LL test and a
>> double test.
There isn't - other than double-checking is working on smaller exponents.
>For the same FFT-size, the double checking code has to perform a bit
>e
Paul van Grieken asked on 21 Oct 1999 at 17:16 h
> Why is there a difference in iteration time between the LL test and a
> double test.
For the same FFT-size, the double checking code has to perform a bit
extra work per iteration:
it multiplies by 2 before the DWT, and divides by 4 afterward. Th
On 21 Oct 99, at 17:16, Grieken, Paul van wrote:
> But I thought it only took longer to complete not that the iteration
> take longer. So I can say if the number doubles it takes 4x more
> time to complete.
Very roughly, yes. There are (p-2) iterations to do for a test of
exponent p. The co
The exponent you are using to LL test is probably significantly larger
than the exponent your are using to double test. It's doing the same
operation on both but on the LL test it is using a larger FFT (AFIK).
Larger FFT requires more memory. More memory requires more time to juggle
all of that d
Why is there a difference in iteration time between the LL test and a
double test.
The double test took about 0.115sec and a LL test 0.254sec for the same
amount of iterations.
bye,
Paul van Grieken
Alcatel telecom Nederland
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Tel: 070-3079353
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