C clang versus OCaml 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
source	secs	mem	gz	cpu secs
C clang #6	2.25	19,940	1582	8.89
C clang #4	13.18	19,684	1190	13.18
C clang #5	8.08	19,940	917	31.87
C clang #3	34.04	19,684	574	34.04
C clang #2	8.88	19,684	1563	34.87
OCaml #3	8.80	19,676	1024	35.18
OCaml #4	9.13	19,676	1018	36.46
C clang	37.45	19,684	514	37.45
OCaml #2	45.76	19,676	478	45.76
OCaml	51.25	19,676	529	51.25
n-body
source	secs	mem	gz	cpu secs
C clang #9	2.20	19,684	1639	2.20
C clang #4	4.63	19,684	1496	4.63
C clang #5	4.86	19,684	1436	4.86
C clang #6	5.32	19,684	1186	5.32
C clang #2	5.50	19,684	1270	5.50
C clang	5.51	19,716	1179	5.51
C clang #8	5.59	19,748	1398	5.59
C clang #3	6.12	19,684	1214	6.11
C clang #7	6.77	19,684	1250	6.77
OCaml	6.94	19,676	1255	6.94
spectral-norm
source	secs	mem	gz	cpu secs
C clang #6	0.40	20,980	1203	1.57
C clang #5	0.72	19,700	576	2.87
C clang #8	0.73	19,700	941	2.88
C clang #4	0.73	20,820	1145	2.89
OCaml #2	5.32	19,676	383	5.32
C clang	5.40	19,700	390	5.40
C clang #3	1.44	20,916	470	5.75
C clang #7	1.84	20,756	906	7.28
mandelbrot
source	secs	mem	gz	cpu secs
C clang #9	1.23	34,304	700	4.89
C clang #8	1.53	34,688	788	6.09
C clang #4	3.47	34,176	805	13.83
C clang	3.49	33,024	828	13.92
C clang #7	3.53	34,048	1000	14.02
C clang #3	3.58	32,896	769	14.26
C clang #2	25.50	19,684	412	25.49
OCaml #6	28.76	19,676	450	28.76
OCaml	7.59	19,676	723	30.20
C clang #6		Make Error
pidigits
source	secs	mem	gz	cpu secs
C clang #2	0.82	19,780	422	0.82
C clang	0.88	19,876	459	0.88
OCaml #5	2.75	19,676	465	2.75
OCaml #7		Make Error
regex-redux
source	secs	mem	gz	cpu secs
C clang #5	0.82	154,520	1403	2.82
C clang #2	3.22	103,424	1121	3.22
OCaml #3	2.20	451,620	653	3.35
C clang #4	0.97	154,248	1237	3.77
C clang #3	1.74	105,728	1273	4.32
OCaml #2	13.99	922,636	644	13.99
fasta
source	secs	mem	gz	cpu secs
C clang #9	0.78	19,684	1469	0.78
C clang #5	1.19	19,684	1286	1.19
C clang #8	2.43	19,684	1299	2.43
C clang #6	1.01	19,684	1936	2.96
C clang #2	0.82	19,684	2276	3.26
C clang #7	0.85	19,684	2018	3.31
OCaml #6	3.36	201,984	1194	3.36
C clang	3.61	19,860	1213	3.61
C clang #3	4.58	19,860	825	4.58
OCaml #3	4.71	19,676	1075	4.71
C clang #4		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C clang	6.37	129,248	1512	13.99
OCaml #3	16.29	258,556	1839	43.41
OCaml	45.59	338,436	894	45.59
OCaml #2	27.45	314,312	1247	61.90
reverse-complement
source	secs	mem	gz	cpu secs
C clang #7	0.44	499,748	1899	0.61
C clang #8	0.46	499,876	1551	0.70
C clang #2	1.15	994,560	757	1.67
C clang #5	2.07	994,176	654	2.07
C clang #4	3.79	500,480	716	3.79
C clang #6	1.02	706,096	828	4.04
OCaml	2.25	19,676	1372	5.09
OCaml #3	2.28	19,676	1361	5.77
OCaml #2	9.27	909,056	426	9.27
binary-trees
source	secs	mem	gz	cpu secs
C clang #2	1.64	170,112	816	5.30
C clang #3	1.84	134,144	842	5.79
OCaml #5	7.80	221,952	468	7.80
OCaml #2	3.59	216,628	759	10.35
C clang	17.79	264,064	660	17.79
C clang #5	9.39	351,232	914	33.96
C clang	Ubuntu clang version 18.1.3
OCaml	OCaml native-code 5.4.0+dev0-2024-08-25