Benchmark CPU results

[joslloand]

mtmccrea/Hilbert#10

Quick benchmarks:

• late 2016 Macbook Pro
• 50 instances of [real, imag] output

Weaver method
notes
// s.options.numWireBufs_(64*16); // required for 50 instances of HilbertW (pv_brickwall implementation)

• *ar, DelayN (real) & PV_brickwall (imag, size: 2048): avg 9.2%, pk 17.5%, avg fluctuates quite a bit

PDN method
notes
// it appears the sin/cos parts are reversed or the imaginary part has its phase inverted
// magnitude response not so great at high freqs... especially the FOS version

• *ar, FOS: avg 14%, pk 19.5%
• *ar1, SOS: avg 11%, pk 14.7%
• *ar2, SOS, refactored: avg 11%, pk 14.7% (same as *ar1)

Hartley method
notes
// currently uses the DelayL version for the real part...

• *ar, DelayL & Convolution2 (size: 2048) : avg 4.7%, pk 17.6%, disparity is LARGE

[joslloand]

Since these measurements were made, the implementations have changed.

New measurements are required for documentation.