Help from a Labview 8 user please

[Gary Rubin]

I would like to evaluate the relative speeds of a 32k point FFT vs. a 1024 pt Chirp-Z transform. The Chirp-Z transform is available in the non-base version of LV8. I am still on LV7.1.

Is there anyone with LV8 who would be willing to insert the Chirp-Z subvi into the attached benchmarking vi, run it, and tell me what kind of speed results you get? I understand that the speeds will be dependent on implementation, and this will eventually be implemented in something other than Labview, but this will at least give me a ballpark estimate of the relative speeds.

Thanks!

Gary

Download File:post-4344-1153399832.vi

[Ton Plomp]

Well if my measurement is correct you're not looking into chirpZ....

Ton

[Gary Rubin]

Well if my measurement is correct you're not looking into chirpZ....

Well, that's somewhat disappointing.

Thank you very much.

Interestingly, your FFT is approximately twice as fast as mine.

I'm running LV7.1 on a 2.4 GHz P4 w/ 1GB RAM. I wonder if it's all because of differences in machines, or whether NI has recoded their FFT between 7.1 and 8.

Thanks again,

Gary

[Ton Plomp]

Well, that's somewhat disappointing.

Thank you very much.

Interestingly, your FFT is approximately twice as fast as mine.

I'm running LV7.1 on a 2.4 GHz P4 w/ 1GB RAM. I wonder if it's all because of differences in machines, or whether NI has recoded their FFT between 7.1 and 8.

Thanks again,

Gary

I'm not sure, but my computer is something like yours.

If i rememeber i'll test it this weekend at home on 7 and 8.

Ton

[Ton Plomp]

did remember

but 8.0 is lightly faste (0.2 ms)

Ton