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	3.31	19,760	1535	13.11
* C++ g++ #7	14.03	19,760	1156	14.03
C++ g++ #5	7.85	19,760	987	30.68
Go #3	8.34	19,808	975	33.31
C++ g++ #4	8.92	19,760	1445	35.00
C++ g++ #2	9.13	19,760	1446	35.73
C++ g++ #3	37.88	19,760	600	37.87
C++ g++	10.49	19,760	1065	41.21
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	19,760	1933	2.15
* C++ g++ #7	4.11	19,760	1815	4.11
C++ g++ #9	5.14	19,760	1536	5.14
C++ g++ #3	5.32	19,760	1402	5.32
* C++ g++ #4	5.45	19,760	1434	5.45
* C++ g++ #2	6.02	19,352	1524	6.01
C++ g++ #5	6.32	19,760	1544	6.32
Go #3	6.38	19,808	1207	6.40
C++ g++	6.61	19,760	1666	6.61
C++ g++ #6	6.93	19,760	1674	6.93
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	0.73	19,760	1050	2.86
* C++ g++ #5	1.33	19,760	1050	5.28
C++ g++	5.33	19,760	459	5.33
Go #8	5.33	19,416	429	5.34
Go	5.33	19,808	417	5.34
Go #2	1.50	19,808	674	5.68
Go #4	1.45	19,808	555	5.69
C++ g++ #7	1.52	19,512	1284	6.04
mandelbrot
source	secs	mem	gz	cpu secs
* C++ g++ #4	0.89	35,344	3554	3.45
* C++ g++	0.89	34,952	1797	3.47
* C++ g++ #6	0.98	35,080	1014	3.87
C++ g++ #0	2.35	35,476	2752	9.30
* C++ g++ #7	4.86	35,176	749	13.28
C++ g++ #5	13.44	34,636	596	13.43
C++ g++ #9	3.52	35,120	732	13.55
Go #4	3.76	35,456	912	14.99
Go #3	3.77	35,456	900	15.00
C++ g++ #2	16.95	34,636	700	16.94
Go	5.02	33,024	829	20.02
Go #8	26.68	19,440	500	26.74
Go #2	6.85	33,152	843	27.28
C++ g++ #3	27.37	19,760	421	27.36
Go #6	6.89	33,024	707	27.44
fasta
source	secs	mem	gz	cpu secs
C++ g++ #9	0.78	19,352	2758	1.54
C++ g++ #2	1.84	19,760	1129	1.84
C++ g++	1.92	19,760	1064	1.92
C++ g++ #3	2.63	19,760	1311	2.63
C++ g++ #7	0.87	19,760	2711	3.05
C++ g++ #4	3.32	19,760	1291	3.32
C++ g++ #5	1.06	19,760	2345	3.66
Go	3.73	19,808	1055	3.74
C++ g++ #6	1.07	19,760	2326	4.01
Go #2	1.27	19,808	1405	4.06
Go #3	1.51	19,808	1362	4.09
Go #8	11.46	19,820	880	11.55
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	2.01	156,592	1634	5.98
C++ g++ #3	4.19	165,580	1280	13.94
C++ g++	6.96	757,156	1452	14.75
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
Go #8	61.96	537,908	752	62.57
reverse-complement
source	secs	mem	gz	cpu secs
* C++ g++ #2	0.74	499,916	2099	0.74
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	3.30	1,517,824	1827	4.38
C++ g++	6.52	980,156	599	6.51
C++ g++ #5	37.59	771,632	704	37.58
Go #5		Bad Output
Go		Failed
C++ g++ #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
C++ g++ #7	0.97	201,512	896	3.40
C++ g++ #5	1.16	200,724	891	4.10
C++ g++ #9	1.74	136,120	815	4.63
C++ g++ #3	1.91	265,636	951	4.74
C++ g++ #6	1.91	266,120	851	4.77
C++ g++ #4	2.22	266,136	826	5.20
C++ g++	2.65	2,153,044	760	9.23
C++ g++ #2	22.83	265,840	514	22.82
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
pidigits
source	secs	mem	gz	cpu secs
C++ g++ #4	0.71	19,760	521	0.71
* C++ g++ #5	0.73	19,760	804	0.73
* Go #4	0.82	19,808	689	0.83
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 #6	2.46	19,512	727	2.46
Go #7	4.99	19,808	702	5.61
regex-redux
source	secs	mem	gz	cpu secs
C++ g++ #6	1.15	276,336	2856	2.24
Go #5	3.25	321,360	817	5.43
C++ g++ #3	12.38	215,640	859	17.95
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++		Make Error
C++ g++ #2		Make Error
C++ g++ #5		Make Error
C++ g++ #4		Make Error
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Go	go version go1.23.1 linux/amd64 GOAMD64=v2