C++ g++ versus C#

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# #5	2.35	9.03	33,559	1485	7.63
* 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# #2	30.41	30.39	32,924	584	8.13
C++ g++ #5	7.86	30.73—30.82	5,792	987	3.67
* C# #9	8.43	33.37	34,038	1232	7.74
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# #6	9.95	39.50—39.54	33,300	1075	7.64
C++ g++	10.53	41.25—41.55	5,534	1065	3.88
C# #3	11.04	44.49—46.04	33,182	1117	7.89
C# #8	43.84	43.83—43.87	32,858	519	7.51
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# #9	3.20	3.18	32,059	2480	7.92
* C# #4	3.77	3.75	32,215	2137	8.55
* C++ g++ #7	4.09	4.12—4.17	5,124	1815	4.18
* C# #7	4.83	4.81	32,297	1715	7.54
* C# #6	4.85	4.84	32,203	1754	7.89
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
C++ g++	6.62	6.64	2,499	1666	3.15
C# #3	6.68	6.66	33,280	1311	7.62
C# #2	6.92	6.92	33,280	1339	7.93
C++ g++ #6	6.94	6.93—6.98	2,499	1674	2.98
C# #8	7.24	7.23	32,870	1335	7.70
C#	7.68	7.67	33,341	1424	7.60
C# #0	7.68	7.67	33,300	1342	7.60
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# #5	0.96	3.44—3.64	37,929	776	8.71
* C++ g++ #5	1.33	5.28	5,820	1050	2.86
C++ g++	5.34	5.34	5,292	459	3.75
C# #8	5.43	5.41	33,214	441	7.70
C# #3	1.56	5.82	36,172	890	8.36
C++ g++ #7	1.53	6.07	4,071	1284	2.71
C# #2		Empty
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# #7	3.23	12.59—12.90	73,056	915	7.76
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
* C#	3.97	15.56—15.67	70,214	1980	10.98
* C# #9	3.95	15.46—15.61	70,402	822	7.95
C# #5	4.08	15.88	68,202	851	11.86
C++ g++ #2	16.96	16.96	36,704	700	3.28
C# #8	26.42	26.42	33,915	492	7.59
C# #3	6.81	26.76—26.83	66,859	722	7.65
C++ g++ #3	27.38	27.38	5,181	421	3.69
C# #2	47.72	48.00—48.46	33,300	504	7.60
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C# #9	1.23	1.23	33,571	1512	7.79
* 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
C++ g++ #6	1.08	3.90	7,127	2326	3.72
C# #5	1.53	5.45—5.54	47,833	1702	7.79
C# #8	5.80	5.49	37,343	904	8.59
C#	1.80	6.22—6.38	40,841	2113	7.88
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#	3.26	10.80—11.05	190,829	2046	7.66
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
C# #6	5.73	15.07—15.28	189,972	1615	7.65
C# #4	12.25	43.35—45.07	606,466	1725	7.64
C# #7	42.96	43.57—43.83	557,740	1449	7.50
C# #8	87.51	79.54—80.86	1,408,664	736	7.89
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
* C# #9	0.68	1.51	550,793	2641	12.35
C#	3.32	3.31—3.39	666,341	1130	7.59
C# #5	2.59	3.87	1,056,952	1620	7.47
C# #6	1.75	4.03—4.07	1,058,517	1627	7.69
C# #7	1.69	4.47—4.62	967,602	1312	11.98
C++ g++	6.55	6.55—6.68	1,006,805	599	3.43
C# #3	8.65	13.47—13.71	1,266,110	934	8.01
C++ g++ #5	37.66	37.65—37.69	792,846	704	3.40
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# #2	6.47	18.08—18.35	1,107,055	717	7.59
C# #7	6.40	18.01—18.41	1,053,831	706	7.48
C#	7.20	20.10—20.51	3,005,301	668	8.11
C# #3	7.42	20.59—21.11	3,014,975	688	7.55
C++ g++ #2	22.77	22.81—23.05	274,080	514	3.52
C# #6		Empty
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
* C# #6	0.84	0.82	34,796	1182	7.91
* C# #5	0.86	0.89	37,335	990	7.47
* C# #4	1.31	1.30	35,496	1135	7.69
C# #7	11.08	9.19—10.76	44,098	579	7.80
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
* C# #2	1.43	2.64	402,747	1881	7.54
C#	4.63	4.83	618,988	641	7.95
C# #5	1.90	5.18—5.38	632,472	679	7.53
C++ g++ #3	12.37	18.03—18.68	222,614	859	12.29
C# #4	8.59	30.62—33.76	882,033	854	7.44
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
C#	.NET SDK 9.0.100 Host Version: 9.0.0 Commit: 9d5a6a9aa4 <OutputType>Exe <TargetFramework>net9.0 <ImplicitUsings>enable <Nullable>enable <AllowUnsafeBlocks>true <ServerGarbageCollection>true <ConcurrentGarbageCollection>true <PublishAot>false