C# versus Go

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# #2	30.41	30.39	32,924	584	8.13
Go #3	8.36	33.35	3,846	975	5.31
* C# #9	8.43	33.37	34,038	1232	7.74
C# #6	9.95	39.50—39.54	33,300	1075	7.64
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
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# #9	3.20	3.18	32,059	2480	7.92
* C# #4	3.77	3.75	32,215	2137	8.55
* C# #7	4.83	4.81	32,297	1715	7.54
* C# #6	4.85	4.84	32,203	1754	7.89
Go #3	6.39	6.41	3,191	1207	5.43
C# #3	6.68	6.66	33,280	1311	7.62
C# #2	6.92	6.92	33,280	1339	7.93
Go	7.02	7.09—7.27	3,228	1316	5.36
Go #2	7.04	7.06	3,203	1222	5.35
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
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# #5	0.96	3.44—3.64	37,929	776	8.71
Go #8	5.34	5.36	3,838	429	5.35
Go	5.34	5.36	4,059	417	5.35
C# #8	5.43	5.41	33,214	441	7.70
Go #4	1.43	5.69	4,174	555	5.45
Go #2	1.51	5.70	4,317	674	5.56
C# #3	1.56	5.82	36,172	890	8.36
C# #2		Empty
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C# #7	3.23	12.59—12.90	73,056	915	7.76
Go #4	3.77	15.02	37,970	912	5.49
Go #3	3.78	15.03	38,101	900	5.82
* 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
Go	5.04	20.05	35,787	829	5.40
C# #8	26.42	26.42	33,915	492	7.59
C# #3	6.81	26.76—26.83	66,859	722	7.65
Go #8	26.70	26.77	3,199	500	5.39
Go #2	6.87	27.32	35,549	843	5.69
Go #6	6.91	27.48	35,119	707	5.69
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
Go	3.74	3.76	3,207	1055	5.36
Go #2	1.27	4.08	12,644	1405	5.51
Go #3	1.52	4.10	5,095	1362	5.29
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
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#	3.26	10.80—11.05	190,829	2046	7.66
C# #6	5.73	15.07—15.28	189,972	1615	7.65
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
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
Go #8	61.38	62.37—62.83	558,379	752	5.20
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# #9	0.68	1.51	550,793	2641	12.35
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
C#	3.32	3.31—3.39	666,341	1130	7.59
Go #6	1.93	3.46—3.52	1,277,608	1340	4.77
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# #3	8.65	13.47—13.71	1,266,110	934	8.01
Go #5		Bad Output
Go		Empty
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
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
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
C# #6		Empty
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C# #6	0.84	0.82	34,796	1182	7.91
* Go #4	0.82	0.84	6,402	689	8.17
* C# #5	0.86	0.89	37,335	990	7.47
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
* C# #4	1.31	1.30	35,496	1135	7.69
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
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# #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
Go #5	3.23	5.40—5.44	297,800	817	8.13
C# #4	8.59	30.62—33.76	882,033	854	7.44
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#	.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
Go	go version go1.23.1 linux/amd64 GOAMD64=v2