Go versus C++ g++ fastest programs

Back in April 2010, Russ Cox charitably suggested that only fannkuch-redux, fasta, k-nucleotide, mandlebrot, nbody, reverse-complement and spectral-norm were close to fair comparisons. As someone who implemented programming languages, his interest was "measuring the quality of the generated code when both compilers are presented with what amounts to the same program."

Differences in approach - to memory management, parallel programming, regex, arbitrary precision arithmetic, implementation technique - don't fit in that kind-of fair comparison — but we still have to deal with them.

These are only the fastest programs. There may be additional measurements for programs which seem more-like a fair comparison to you. Always look at the source code.

pidigits
source	secs	mem	gz	busy	cpu load
Go	2.10	8,448	603	2.17	1% 48% 55% 0%
C++ g++	1.89	4,552	513	1.92	1% 100% 1% 0%
fasta
source	secs	mem	gz	busy	cpu load
Go	2.08	3,560	1358	5.61	80% 37% 76% 78%
C++ g++	1.46	2,216	2711	4.40	75% 75% 76% 75%
fannkuch-redux
source	secs	mem	gz	busy	cpu load
Go	17.56	1,524	900	70.00	100% 100% 100% 100%
C++ g++	10.69	1,896	980	42.28	100% 100% 96% 100%
spectral-norm
source	secs	mem	gz	busy	cpu load
Go	3.94	2,740	548	15.74	100% 100% 100% 100%
C++ g++	1.98	2,268	1044	7.89	100% 99% 99% 99%
reverse-complement
source	secs	mem	gz	busy	cpu load
Go	3.83	1,782,940	1338	6.67	21% 74% 16% 62%
C++ g++	1.61	996,244	1226	2.76	25% 24% 96% 27%
n-body
source	secs	mem	gz	busy	cpu load
Go	21.25	1,588	1310	21.48	0% 1% 100% 0%
C++ g++	7.92	1,116	1773	8.51	6% 1% 1% 100%
k-nucleotide
source	secs	mem	gz	busy	cpu load
Go	11.77	160,184	1607	44.52	94% 98% 94% 92%
C++ g++	3.81	156,348	1624	11.78	70% 70% 73% 96%
mandelbrot
source	secs	mem	gz	busy	cpu load
Go	5.47	31,088	905	21.77	100% 99% 99% 99%
C++ g++	1.51	25,828	1791	6.03	100% 100% 100% 100%
binary-trees
source	secs	mem	gz	busy	cpu load
Go	25.17	361,152	1005	86.86	87% 89% 86% 84%
C++ g++	3.92	114,136	809	12.90	82% 75% 73% 98%
regex-redux
source	secs	mem	gz	busy	cpu load
Go	29.82	428,224	802	62.65	48% 45% 52% 65%
C++ g++	1.83	203,932	1315	4.44	44% 99% 48% 51%
Go	go version go1.13 linux/amd64
C++ g++	g++ (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008