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
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	3.33	5,800	1535	13.117
* C++ g++ #7	14.06	2,449	1156	14.04—14.11
C++ g++ #5	7.86	5,792	987	30.73—30.82
Go #3	8.36	3,846	975	33.351
C++ g++ #4	8.91	5,710	1445	34.99—35.47
C++ g++ #2	9.14	5,698	1446	35.88—36.26
C++ g++ #3	37.89	2,351	600	37.90—37.99
C++ g++	10.53	5,534	1065	41.25—41.55
Go #8	46.15	3,207	500	46.26—46.33
Go	12.27	4,903	906	49.087
Go #2	12.36	16,966	903	49.402
n-body
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #0	2.15	2,417	1933	2.155
* C++ g++ #7	4.09	5,124	1815	4.12—4.17
C++ g++ #9	5.15	2,486	1536	5.169
C++ g++ #3	5.33	2,482	1402	5.336
* C++ g++ #4	5.46	2,482	1434	5.456
* C++ g++ #2	6.02	2,490	1524	6.02—6.10
C++ g++ #5	6.33	2,478	1544	6.345
Go #3	6.39	3,191	1207	6.408
C++ g++	6.62	2,499	1666	6.636
C++ g++ #6	6.94	2,499	1674	6.93—6.98
Go	7.02	3,228	1316	7.09—7.27
Go #2	7.04	3,203	1222	7.062
Go #8	9.60	3,191	1224	9.635
spectral-norm
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	0.72	3,981	1050	2.859
* C++ g++ #5	1.33	5,820	1050	5.284
C++ g++	5.34	5,292	459	5.341
Go #8	5.34	3,838	429	5.356
Go	5.34	4,059	417	5.356
Go #4	1.43	4,174	555	5.693
Go #2	1.51	4,317	674	5.696
C++ g++ #7	1.53	4,071	1284	6.067
mandelbrot
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #4	0.89	37,941	3554	3.464
* C++ g++	0.90	37,626	1797	3.479
* C++ g++ #6	0.98	37,908	1014	3.874
C++ g++ #0	2.36	38,281	2752	9.314
* C++ g++ #7	4.87	38,048	749	13.299
C++ g++ #5	13.47	36,884	596	13.493
C++ g++ #9	3.53	37,863	732	13.587
Go #4	3.77	37,970	912	15.017
Go #3	3.78	38,101	900	15.033
C++ g++ #2	16.96	36,704	700	16.960
Go	5.04	35,787	829	20.048
Go #8	26.70	3,199	500	26.767
Go #2	6.87	35,549	843	27.315
C++ g++ #3	27.38	5,181	421	27.381
Go #6	6.91	35,119	707	27.481
fasta
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #9	0.78	6,214	2758	1.558
C++ g++ #2	1.85	5,108	1129	1.849
C++ g++	1.93	5,104	1064	1.930
C++ g++ #3	2.63	5,284	1311	2.632
C++ g++ #7	0.88	6,304	2711	3.060
C++ g++ #4	3.34	2,363	1291	3.335
C++ g++ #5	1.07	7,012	2345	3.69—3.73
Go	3.74	3,207	1055	3.755
C++ g++ #6	1.08	7,127	2326	3.901
Go #2	1.27	12,644	1405	4.078
Go #3	1.52	5,095	1362	4.095
Go #8	11.22	9,052	880	11.54—11.80
k-nucleotide
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #2	2.02	162,349	1634	6.05—6.54
C++ g++ #3	4.19	171,622	1280	13.83—14.44
C++ g++	7.04	778,510	1452	15.17—15.69
Go #7	7.58	168,186	1613	28.83—29.08
Go #3	8.20	150,413	1729	29.98—30.69
Go #6	8.30	150,442	1596	30.22—30.75
Go #4	9.27	144,650	1552	32.00—35.21
Go #8	61.38	558,379	752	62.37—62.83
reverse-complement
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #2	0.76	514,101	2099	0.757
Go #2	2.22	822,211	614	2.34—2.39
Go #3	2.50	821,985	609	2.62—2.66
Go #6	1.93	1,277,608	1340	3.46—3.52
C++ g++	6.55	1,006,805	599	6.55—6.68
C++ g++ #5	37.66	792,846	704	37.65—37.69
Go #5		Bad Output
Go		Empty
C++ g++ #6		Bad Output
C++ g++ #3		Bad Output
binary-trees
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #7	1.01	175,108	896	3.46—3.62
C++ g++ #5	1.17	208,171	891	4.12—4.17
C++ g++ #9	1.76	140,571	815	4.66—4.82
C++ g++ #6	1.93	273,973	851	4.90—5.09
C++ g++ #3	2.28	273,715	951	5.06—5.10
C++ g++ #4	2.22	273,977	826	5.20—5.33
C++ g++	2.69	1,896,727	760	9.43—9.52
C++ g++ #2	22.77	274,080	514	22.81—23.05
Go #6	27.93	416,195	618	29.32—29.66
Go #2	14.21	635,613	672	56.45—56.55
Go #3	14.90	329,499	806	57.97—58.17
Go #5	14.68	386,056	957	57.76—58.07
Go	32.05	243,114	488	59.81—60.00
Go #7	32.57	241,345	531	61.40—61.53
pidigits
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #4	0.72	6,496	521	0.717
* C++ g++ #5	0.73	6,300	804	0.730
* Go #4	0.82	6,402	689	0.836
Go	1.15	7,533	715	1.22—1.31
* Go #3	1.17	6,885	610	1.35—1.49
Go #2	1.76	7,823	740	1.90—2.03
Go #6	2.47	10,703	727	2.484
Go #7	5.00	10,527	702	5.653
regex-redux
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #6	1.14	285,639	2856	2.249
Go #5	3.23	297,800	817	5.40—5.44
C++ g++ #3	12.37	222,614	859	18.03—18.68
Go #4	14.49	349,008	832	35.20—35.71
Go #3	25.15	336,585	836	61.72—63.46
Go	25.79	301,662	749	61.91—62.99
C++ g++		Empty
C++ g++ #2		Empty
C++ g++ #5		Empty
C++ g++ #4		Empty
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Go	go version go1.23.1 linux/amd64 GOAMD64=v2