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	2.24	19,772	1582	8.86
* C clang #4	13.37	19,772	1190	13.37
C clang #5	8.09	19,772	917	31.94
* C clang #2	8.67	19,772	1563	34.02
C clang #3	34.16	19,772	574	34.15
OCaml #3	8.80	19,676	1024	35.18
C clang #8	36.39	19,492	483	36.38
OCaml #4	9.13	19,676	1018	36.46
C clang	36.51	19,772	514	36.50
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	19,772	1639	2.20
* C clang #5	4.86	19,772	1436	4.86
C clang #6	5.16	19,772	1186	5.16
C clang	5.37	19,772	1179	5.37
C clang #2	5.42	19,772	1270	5.42
* C clang #4	5.60	19,772	1398	5.59
C clang #8	5.72	19,492	1193	5.72
C clang #3	6.12	19,772	1214	6.12
C clang #7	6.77	19,772	1250	6.77
OCaml	6.94	19,676	1255	6.94
spectral-norm
source	secs	mem	gz	cpu secs
* C clang #6	0.38	19,772	1203	1.52
* C clang #4	0.72	19,772	1145	2.86
* C clang #2	0.72	19,772	941	2.87
* C clang #5	0.72	19,772	576	2.88
OCaml #2	5.32	19,676	383	5.32
C clang #8	5.40	19,772	389	5.40
C clang #3	1.46	19,772	470	5.77
* C clang #7	1.82	19,772	906	7.24
mandelbrot
source	secs	mem	gz	cpu secs
C clang #9	1.22	34,332	700	4.85
C clang #5	1.53	34,864	788	6.09
* C clang #4	3.47	34,328	805	13.82
* C clang	3.49	33,172	828	13.93
* C clang #7	3.53	34,216	1000	14.00
* C clang #3	3.55	33,108	769	14.15
C clang #8	25.27	19,496	412	25.27
OCaml #6	28.76	19,676	450	28.76
OCaml	7.59	19,676	723	30.20
* C clang #6		Make Error
fasta
source	secs	mem	gz	cpu secs
C clang #9	0.78	19,772	1469	0.78
C clang #5	1.19	19,772	1286	1.19
C clang #7	2.43	19,772	1299	2.43
C clang #6	1.03	19,772	1936	3.03
C clang #2	0.83	19,772	2276	3.28
OCaml #6	3.36	201,984	1194	3.36
C clang	3.46	19,772	1213	3.46
C clang #8	4.60	19,772	825	4.60
OCaml #3	4.71	19,676	1075	4.71
C clang #4		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C clang	6.30	129,228	1512	13.92
* 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	0.45	499,996	1899	0.63
C clang #9	0.46	499,976	1551	0.70
C clang #2	1.16	994,536	757	1.69
C clang #5	2.08	994,108	654	2.07
* C clang #4	3.74	500,452	716	3.74
C clang #6	1.03	703,416	828	4.07
* 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	1.66	170,236	816	5.36
C clang #3	1.89	134,272	842	5.88
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 #8	19.63	285,536	607	19.62
C clang #5	9.25	351,328	914	33.65
pidigits
source	secs	mem	gz	cpu secs
C clang #2	0.74	19,772	422	0.74
C clang	0.74	19,772	459	0.74
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	154,568	1403	2.82
C clang #2	3.22	103,364	1121	3.22
* OCaml #3	2.20	451,620	653	3.35
C clang #4	0.98	154,488	1237	3.82
C clang #3	1.75	105,848	1273	4.31
* OCaml #2	13.99	922,636	644	13.99
C clang	Ubuntu clang version 18.1.8 (11)
OCaml	OCaml native-code 5.4.0+dev0-2024-08-25