chore: gradual benchmark pub rand

[Lazar955]

I had to introduce helper functions to get gradual timing of functions inside commitPubRandPairs.

Findings

Seems that most of the time is spent at GetPubRandList following AddPubRandProofList. As input (NumPubRand) grows we see an increase in time.

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Results:

NumPubRand	Iterations (b.N)	Time per Iteration (ns/op)	Time per Iteration (ms)	AddPubRandProofList (ns / ms)	% AddPubRandProofList	CommitPubRandList (ns / ms)	% CommitPubRandList	GetPubRandList (ns / ms)	% GetPubRandList
10	42	27,770,395	27.77	14,544,106 / 14.54	52.43%	1,442,187 / 1.44	5.19%	11,753,113 / 11.75	42.34%
50	16	68,078,846	68.08	15,242,174 / 15.24	22.40%	1,242,602 / 1.24	1.83%	51,516,203 / 51.52	75.69%
100	9	122,120,093	122.12	16,093,750 / 16.09	13.16%	1,271,602 / 1.27	1.04%	104,604,153 / 104.60	85.62%
200	5	231,700,700	231.70	17,093,217 / 17.09	7.37%	1,268,492 / 1.27	0.55%	213,090,417 / 213.09	92.08%
500	2	546,630,958	546.63	20,933,896 / 20.93	3.83%	1,244,730 / 1.24	0.23%	523,769,854 / 523.77	95.52%
1,000	1	1,063,210,125	1,063.21	20,605,666 / 20.61	1.94%	1,276,208 / 1.28	0.12%	1,039,780,500 / 1,039.78	97.72%
5,000	1	5,235,733,292	5,235.73	37,567,250 / 37.57	0.72%	1,250,916 / 1.25	0.02%	5,193,632,875 / 5,193.63	99.15%
10,000	1	10,479,790,875	10,479.79	73,979,584 / 73.98	0.71%	1,314,334 / 1.31	0.01%	10,397,781,458 / 10,397.78	99.07%
25,000	1	26,012,446,417	26,012.45	245,269,750 / 245.27	0.94%	1,380,083 / 1.38	0.01%	25,750,781,708 / 25,750.78	99.06%
50,000	1	52,544,326,750	52,544.33	816,153,875 / 816.15	1.55%	1,354,375 / 1.35	0.03%	51,695,706,875 / 51,695.71	98.41%
75,000	1	79,272,072,959	79,272.07	1,696,296,750 / 1,696.30	2.14%	1,275,250 / 1.28	0.02%	77,517,351,000 / 77,517.35	97.67%
100,000	1	106,582,957,334	106,582.96	2,905,885,458 / 2,905.89	2.73%	1,341,375 / 1.34	0.01%	103,598,760,375 / 103,598.76	97.22%

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Closes

[gitferry]

Nice work!

[gitferry]

can we move all the helper functionalities to a separate file, maybe benchmark_helper.go?

[gitferry]

it would be more helpful if we can show the persontage of each part. Does go benchmark support it?