Oh cool, thanks for the tips. I'll dive in and be back!
On Friday, 8 April 2016 08:18:17 UTC+1, DNF wrote: > > The xcorr function calls the conv function, which again uses fft. If you > know the general structure and length of your signals ahead of time, you > can probably gain some performance by planning the ffts beforehand. I don't > know why it doesn't work for you, but you could have a look in at conv in > dsp.jl. > > If you *really* want to speed things up, though, you might implement your > own xcorr. xcorr dominates the runtime in your function, and if you know > an upper bound on the signal lags, you can implement xcorr with a limited > number of lags. By default xcorr calculates for all lags (in your case > that's 2*48000*60-1 ~ 6million lags). If you know that the max lag is 1 > second, you can save ~98% percent of the runtime of xcorr. > > A couple of other remarks: > * There's no need to put type annotations next to the function outputs, > it's just visual noise > * Use ct_idx = cld(lₛ, 2) and forget about the mod. >
