C++ g++ versus Go fastest performance

How the programs are written matters! Always look at the source code.

If the fastest programs are hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code.

fannkuch-redux
source	secs	mem	gz	cpu secs
C++ g++ #6	3.26	19,712	1535	12.91
C++ g++ #7	13.96	19,712	1156	13.96
C++ g++ #5	8.00	19,712	987	31.23
Go #3	8.34	19,808	975	33.31
C++ g++ #4	9.26	19,688	1445	36.31
C++ g++ #3	36.90	19,688	600	36.90
C++ g++ #2	9.55	19,712	1446	37.53
C++ g++	10.87	19,712	1065	42.73
Go #8	46.13	19,440	500	46.24
Go	12.29	19,808	906	49.04
Go #2	12.35	19,808	903	49.32
n-body
source	secs	mem	gz	cpu secs
C++ g++ #0	2.15	19,736	1933	2.15
C++ g++ #7	3.96	19,736	1815	3.96
C++ g++ #2	4.20	19,736	1884	4.20
C++ g++ #3	5.31	19,736	1402	5.31
C++ g++ #9	5.44	19,736	1536	5.44
C++ g++ #4	5.45	19,736	1434	5.45
C++ g++ #5	6.02	19,736	1544	6.01
Go #3	6.38	19,808	1207	6.40
C++ g++	6.50	19,736	1666	6.50
C++ g++ #8	6.54	19,736	1524	6.54
C++ g++ #6	6.91	19,736	1674	6.91
Go	7.01	19,808	1316	7.03
Go #2	7.03	19,808	1222	7.05
Go #8	9.60	19,436	1224	9.62
spectral-norm
source	secs	mem	gz	cpu secs
C++ g++ #6	0.72	19,884	1050	2.85
C++ g++ #5	1.33	19,788	1050	5.27
Go	5.33	19,808	417	5.34
C++ g++	5.37	19,852	459	5.37
Go #2	1.50	19,808	674	5.68
Go #4	1.45	19,808	555	5.69
C++ g++ #8	1.52	19,820	1284	6.06
mandelbrot
source	secs	mem	gz	cpu secs
C++ g++	0.89	34,944	1797	3.47
C++ g++ #4	0.89	35,328	3554	3.47
C++ g++ #6	0.98	35,072	1014	3.90
C++ g++ #0	2.36	35,456	2752	9.30
C++ g++ #8	4.84	34,944	749	13.21
C++ g++ #5	13.35	34,560	596	13.35
C++ g++ #9	3.50	35,072	732	13.49
C++ g++ #7	3.51	35,072	1023	13.94
Go #4	3.76	35,456	912	14.99
Go #3	3.77	35,456	900	15.00
C++ g++ #2	16.94	34,560	700	16.94
Go	5.02	33,024	829	20.02
Go #8	26.68	19,440	500	26.74
C++ g++ #3	27.27	19,736	421	27.27
Go #2	6.85	33,152	843	27.28
Go #6	6.89	33,024	707	27.44
pidigits
source	secs	mem	gz	cpu secs
Go #4	0.82	19,808	689	0.83
C++ g++ #5	0.87	19,736	804	0.87
C++ g++ #4	0.89	19,736	521	0.88
Go	1.18	19,808	715	1.20
Go #3	1.40	19,808	610	1.44
Go #2	1.84	19,808	740	1.89
Go #8	2.46	19,808	727	2.47
Go #7	4.99	19,808	702	5.61
regex-redux
source	secs	mem	gz	cpu secs
C++ g++ #6	1.18	276,148	2856	2.23
C++ g++	3.56	212,180	662	3.56
C++ g++ #2	2.86	212,648	706	3.62
C++ g++ #5	3.81	215,648	859	4.53
Go #5	3.25	321,360	817	5.43
C++ g++ #3	12.46	215,472	859	18.08
Go #4	14.61	369,008	832	35.91
Go	25.37	319,956	749	61.07
Go #3	25.62	371,204	836	61.79
C++ g++ #4		Make Error
fasta
source	secs	mem	gz	cpu secs
C++ g++ #8	0.78	19,712	2758	1.54
C++ g++ #2	1.80	19,712	1129	1.80
C++ g++	1.90	19,712	1064	1.90
C++ g++ #3	2.62	19,712	1311	2.62
C++ g++ #4	3.34	19,712	1291	3.34
C++ g++ #5	1.07	19,712	2345	3.67
Go	3.73	19,808	1055	3.74
C++ g++ #6	1.07	19,712	2326	3.85
Go #2	1.27	19,808	1405	4.06
Go #3	1.51	19,808	1362	4.09
Go #8	18.27	19,440	838	18.46
C++ g++ #7		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	2.02	156,512	1634	6.09
C++ g++ #3	4.18	165,384	1280	13.93
C++ g++	7.10	757,084	1452	14.78
Go #7	7.63	163,072	1613	28.79
Go #3	8.18	145,280	1729	29.88
Go #6	8.21	145,152	1596	30.01
Go #4	9.16	140,032	1552	31.38
reverse-complement
source	secs	mem	gz	cpu secs
C++ g++ #2	0.71	499,712	2099	0.71
Go #2	2.19	800,640	614	2.29
Go #3	2.48	800,384	609	2.57
Go #6	1.91	1,244,508	1340	3.40
C++ g++ #6	3.26	1,517,580	1827	4.32
C++ g++	6.50	979,912	599	6.50
C++ g++ #5	36.24	771,432	704	36.24
Go #5		Bad Output
Go		Failed
C++ g++ #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
C++ g++ #7	0.96	201,536	896	3.35
C++ g++ #5	1.15	200,660	891	4.08
C++ g++ #9	1.65	136,064	815	4.55
C++ g++ #6	1.92	266,112	851	4.74
C++ g++ #3	2.25	265,600	951	5.11
C++ g++ #8	2.22	266,112	826	5.26
C++ g++	2.68	2,068,612	760	9.34
C++ g++ #2	21.96	265,856	514	21.96
Go #6	27.90	404,096	618	29.26
Go #2	14.17	624,780	672	56.29
Go #3	14.91	326,508	806	58.00
Go #5	14.87	425,960	957	58.15
Go	32.01	243,192	488	59.78
Go #7	32.52	248,604	531	61.47
C++ g++ #4		Make Error
C++ g++	Ubuntu 13.2.0-23ubuntu4
Go	go version go1.23.1 linux/amd64 GOAMD64=v2