Go versus C++ g++

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

If the fastest programs are flagged * possible hand-written vector instructions or "unsafe" or naked ffi, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code.

fannkuch-redux
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #6	3.33	13.12	5,800	1535	4.64
* C++ g++ #7	14.06	14.04—14.11	2,449	1156	2.95
C++ g++ #5	7.86	30.73—30.82	5,792	987	3.67
Go #3	8.36	33.35	3,846	975	5.31
C++ g++ #4	8.91	34.99—35.47	5,710	1445	12.14
C++ g++ #2	9.14	35.88—36.26	5,698	1446	11.86
C++ g++ #3	37.89	37.90—37.99	2,351	600	2.70
C++ g++	10.53	41.25—41.55	5,534	1065	3.88
Go #8	46.15	46.26—46.33	3,207	500	5.43
Go	12.27	49.09	4,903	906	5.41
Go #2	12.36	49.40	16,966	903	5.43
n-body
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #0	2.15	2.16	2,417	1933	3.66
* C++ g++ #7	4.09	4.12—4.17	5,124	1815	4.18
C++ g++ #9	5.15	5.17	2,486	1536	3.03
C++ g++ #3	5.33	5.34	2,482	1402	2.85
* C++ g++ #4	5.46	5.46	2,482	1434	2.83
* C++ g++ #2	6.02	6.02—6.10	2,490	1524	3.04
C++ g++ #5	6.33	6.35	2,478	1544	2.92
Go #3	6.39	6.41	3,191	1207	5.43
C++ g++	6.62	6.64	2,499	1666	3.15
C++ g++ #6	6.94	6.93—6.98	2,499	1674	2.98
Go	7.02	7.09—7.27	3,228	1316	5.36
Go #2	7.04	7.06	3,203	1222	5.35
Go #8	9.60	9.64	3,191	1224	5.47
spectral-norm
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #6	0.72	2.86	3,981	1050	3.08
* C++ g++ #5	1.33	5.28	5,820	1050	2.86
C++ g++	5.34	5.34	5,292	459	3.75
Go #8	5.34	5.36	3,838	429	5.35
Go	5.34	5.36	4,059	417	5.35
Go #4	1.43	5.69	4,174	555	5.45
Go #2	1.51	5.70	4,317	674	5.56
C++ g++ #7	1.53	6.07	4,071	1284	2.71
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #4	0.89	3.46	37,941	3554	5.04
* C++ g++	0.90	3.48	37,626	1797	3.59
* C++ g++ #6	0.98	3.87	37,908	1014	4.36
C++ g++ #0	2.36	9.31	38,281	2752	4.60
* C++ g++ #7	4.87	13.30	38,048	749	3.03
C++ g++ #5	13.47	13.49	36,884	596	2.76
C++ g++ #9	3.53	13.59	37,863	732	3.03
Go #4	3.77	15.02	37,970	912	5.49
Go #3	3.78	15.03	38,101	900	5.82
C++ g++ #2	16.96	16.96	36,704	700	3.28
Go	5.04	20.05	35,787	829	5.40
Go #8	26.70	26.77	3,199	500	5.39
Go #2	6.87	27.32	35,549	843	5.69
C++ g++ #3	27.38	27.38	5,181	421	3.69
Go #6	6.91	27.48	35,119	707	5.69
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #9	0.78	1.56	6,214	2758	6.43
C++ g++ #2	1.85	1.85	5,108	1129	2.89
C++ g++	1.93	1.93	5,104	1064	2.98
C++ g++ #3	2.63	2.63	5,284	1311	3.33
C++ g++ #7	0.88	3.06	6,304	2711	4.58
C++ g++ #4	3.34	3.34	2,363	1291	3.03
C++ g++ #5	1.07	3.69—3.73	7,012	2345	3.90
Go	3.74	3.76	3,207	1055	5.36
C++ g++ #6	1.08	3.90	7,127	2326	3.72
Go #2	1.27	4.08	12,644	1405	5.51
Go #3	1.52	4.10	5,095	1362	5.29
Go #8	11.22	11.54—11.80	9,052	880	5.55
k-nucleotide
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #2	2.02	6.05—6.54	162,349	1634	7.41
C++ g++ #3	4.19	13.83—14.44	171,622	1280	5.17
C++ g++	7.04	15.17—15.69	778,510	1452	6.55
Go #7	7.58	28.83—29.08	168,186	1613	5.42
Go #3	8.20	29.98—30.69	150,413	1729	5.63
Go #6	8.30	30.22—30.75	150,442	1596	5.79
Go #4	9.27	32.00—35.21	144,650	1552	5.11
Go #8	61.38	62.37—62.83	558,379	752	5.20
reverse-complement
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #2	0.76	0.76	514,101	2099	4.30
Go #2	2.22	2.34—2.39	822,211	614	4.79
Go #3	2.50	2.62—2.66	821,985	609	4.88
Go #6	1.93	3.46—3.52	1,277,608	1340	4.77
C++ g++	6.55	6.55—6.68	1,006,805	599	3.43
C++ g++ #5	37.66	37.65—37.69	792,846	704	3.40
Go #5		Bad Output
Go		Empty
C++ g++ #6		Bad Output
C++ g++ #3		Bad Output
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #7	1.01	3.46—3.62	175,108	896	7.50
C++ g++ #5	1.17	4.12—4.17	208,171	891	3.87
C++ g++ #9	1.76	4.66—4.82	140,571	815	4.05
C++ g++ #6	1.93	4.90—5.09	273,973	851	4.98
C++ g++ #3	2.28	5.06—5.10	273,715	951	4.79
C++ g++ #4	2.22	5.20—5.33	273,977	826	5.16
C++ g++	2.69	9.43—9.52	1,896,727	760	5.34
C++ g++ #2	22.77	22.81—23.05	274,080	514	3.52
Go #6	27.93	29.32—29.66	416,195	618	5.43
Go #2	14.21	56.45—56.55	635,613	672	5.41
Go #3	14.90	57.97—58.17	329,499	806	5.29
Go #5	14.68	57.76—58.07	386,056	957	5.41
Go	32.05	59.81—60.00	243,114	488	5.21
Go #7	32.57	61.40—61.53	241,345	531	5.30
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #4	0.72	0.72	6,496	521	3.45
* C++ g++ #5	0.73	0.73	6,300	804	3.34
* Go #4	0.82	0.84	6,402	689	8.17
Go	1.15	1.22—1.31	7,533	715	11.71
* Go #3	1.17	1.35—1.49	6,885	610	8.50
Go #2	1.76	1.90—2.03	7,823	740	7.70
Go #6	2.47	2.48	10,703	727	5.59
Go #7	5.00	5.65	10,527	702	6.17
regex-redux [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #6	1.14	2.25	285,639	2856	5.06
Go #5	3.23	5.40—5.44	297,800	817	8.13
C++ g++ #3	12.37	18.03—18.68	222,614	859	12.29
Go #4	14.49	35.20—35.71	349,008	832	8.44
Go #3	25.15	61.72—63.46	336,585	836	5.60
Go	25.79	61.91—62.99	301,662	749	5.85
C++ g++		Empty
C++ g++ #2		Empty
C++ g++ #5		Empty
C++ g++ #4		Empty
Go	go version go1.23.1 linux/amd64 GOAMD64=v2
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0