Go versus C++ g++ fastest performance

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	3.25	19,788	1535	12.89
C++ g++ #7	13.93	19,660	1156	13.93
C++ g++ #5	7.97	19,788	987	31.14
Go #3	8.33	19,664	975	33.25
C++ g++ #3	36.80	19,660	600	36.80
C++ g++ #4	9.47	19,660	1445	37.11
C++ g++ #2	9.82	19,656	1446	38.58
C++ g++	10.59	19,660	1065	41.61
Go	11.74	19,664	906	46.77
Go #2	11.79	19,664	903	46.97
n-body
source	secs	mem	gz	cpu secs
C++ g++ #0	2.14	19,676	1933	2.14
C++ g++ #7	3.97	19,804	1815	3.97
C++ g++ #2	4.20	19,676	1884	4.19
C++ g++ #3	5.30	19,804	1402	5.30
C++ g++ #9	5.43	19,676	1536	5.43
C++ g++ #4	5.44	19,804	1434	5.44
C++ g++ #5	6.01	19,676	1544	6.00
Go #3	6.37	19,808	1207	6.38
C++ g++	6.49	19,676	1666	6.49
C++ g++ #8	6.57	19,676	1524	6.57
C++ g++ #6	6.89	19,676	1674	6.89
Go	7.00	19,680	1316	7.02
Go #2	7.02	19,680	1222	7.03
spectral-norm
source	secs	mem	gz	cpu secs
C++ g++ #6	0.72	19,812	1050	2.84
C++ g++ #5	1.32	19,684	1050	5.25
Go	5.32	19,824	417	5.33
C++ g++	5.36	19,684	459	5.36
Go #2	1.53	19,824	674	5.67
Go #4	1.44	19,824	555	5.67
C++ g++ #8	1.52	19,684	1284	6.04
mandelbrot
source	secs	mem	gz	cpu secs
C++ g++	0.89	34,944	1797	3.46
C++ g++ #4	0.89	35,200	3554	3.47
C++ g++ #6	0.98	35,072	1014	3.89
C++ g++ #0	2.35	35,328	2752	9.28
C++ g++ #8	4.79	35,072	749	13.12
C++ g++ #5	13.33	34,688	596	13.33
C++ g++ #9	3.50	35,200	732	13.49
C++ g++ #7	3.49	35,072	1023	13.90
Go #4	3.76	35,328	912	14.92
Go #3	3.76	35,456	900	14.94
C++ g++ #2	16.90	34,560	700	16.90
Go	5.01	33,408	829	19.98
C++ g++ #3	27.26	19,804	421	27.25
Go #2	6.85	33,152	843	27.29
Go #6	6.89	32,768	707	27.40
pidigits
source	secs	mem	gz	cpu secs
C++ g++ #5	0.86	19,804	804	0.86
C++ g++ #4	0.88	19,804	521	0.88
Go #4	0.95	19,808	689	0.97
Go	1.35	19,696	715	1.37
Go #3	1.58	19,824	610	1.62
Go #2	2.13	19,824	740	2.19
Go #8	2.49	19,696	727	2.50
Go #7	5.12	19,824	702	5.88
regex-redux
source	secs	mem	gz	cpu secs
C++ g++ #6	1.15	276,276	2856	2.18
C++ g++ #2	2.84	212,776	706	3.60
C++ g++	3.62	212,180	662	3.62
C++ g++ #5	3.86	215,556	859	4.54
Go #5	3.17	320,972	817	5.38
C++ g++ #3	12.41	217,580	859	17.91
Go #4	14.51	368,680	832	34.26
Go	25.58	345,472	749	61.95
Go #3	25.72	402,968	836	62.19
C++ g++ #4		Make Error
fasta
source	secs	mem	gz	cpu secs
C++ g++ #8	0.76	19,792	2758	1.51
C++ g++ #2	1.81	19,668	1129	1.81
C++ g++	1.90	19,664	1064	1.90
C++ g++ #3	2.62	19,664	1311	2.62
C++ g++ #4	3.32	19,664	1291	3.32
Go	3.73	19,804	1055	3.74
C++ g++ #6	1.05	19,668	2326	3.85
C++ g++ #5	1.05	19,668	2345	3.88
Go #2	1.26	19,672	1405	4.03
Go #3	1.50	19,664	1362	4.08
C++ g++ #7		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	1.97	156,504	1634	5.87
C++ g++ #3	4.19	165,592	1280	13.77
C++ g++	6.90	757,080	1452	14.68
Go #7	7.52	162,944	1613	28.68
Go #6	8.17	145,152	1596	29.90
Go #3	8.38	145,152	1729	30.32
Go #4	9.07	139,904	1552	30.33
reverse-complement
source	secs	mem	gz	cpu secs
C++ g++ #2	0.70	499,840	2099	0.70
Go #2	2.21	802,176	614	2.30
Go #3	2.47	802,048	609	2.56
Go #6	1.84	1,249,840	1340	3.30
C++ g++ #6	3.20	1,517,660	1827	4.22
C++ g++	6.56	980,060	599	6.56
C++ g++ #5	35.10	771,556	704	35.10
Go #5		Bad Output
Go		Failed
C++ g++ #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
C++ g++ #7	0.95	201,400	896	3.30
C++ g++ #5	1.14	200,660	891	3.98
C++ g++ #9	1.72	135,936	815	4.46
C++ g++ #6	1.88	266,112	851	4.47
C++ g++ #3	1.88	265,600	951	4.72
C++ g++ #8	2.18	265,984	826	5.11
C++ g++	2.65	2,040,792	760	9.07
C++ g++ #2	21.51	265,856	514	21.51
Go #6	27.61	404,608	618	29.03
Go #2	13.87	601,252	672	55.04
Go #5	14.37	308,092	957	56.80
Go #3	14.86	323,544	806	57.39
Go	30.97	262,396	488	57.95
Go #7	33.10	292,588	531	61.68
C++ g++ #4		Make Error
Go	go version go1.22.0 linux/amd64 GOAMD64=v2
C++ g++	Ubuntu 13.2.0-4ubuntu3