C gcc versus Classic Fortran

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	make	cpu secs
* C gcc #6	2.14	2,712	1582	2.68	8.44
* C gcc #4	14.05	2,351	1190	2.31	14.06
C gcc #5	7.28	2,949	917	2.17	28.32—28.45
C gcc #3	36.84	2,343	574	2.19	36.84—36.89
Classic Fortran	39.02	3,191	608	2.95	38.97—39.21
C gcc #8	39.34	2,343	483	2.20	39.52—40.22
C gcc	39.65	2,343	514	2.12	39.64—40.07
* C gcc #2	10.18	2,695	1563	2.51	39.98—40.15
Classic Fortran #3	10.15	12,329	1164	3.36	40.49
n-body
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
* C gcc #9	2.10	2,482	1639	2.99	2.10
* C gcc #4	4.06	2,499	1398	2.98	4.06
Classic Fortran #6	4.22	2,146	1530	2.93	4.23
C gcc #6	4.98	2,482	1186	2.33	4.99
C gcc #2	5.20	2,490	1270	2.43	5.20
C gcc	5.23	2,486	1179	2.58	5.23
C gcc #3	5.24	2,482	1214	2.42	5.24
Classic Fortran #2	5.39	2,146	1507	2.88	5.39
* C gcc #5	5.44	2,494	1436	2.31	5.44
Classic Fortran	5.45	2,142	1400	3.14	5.45
C gcc #8	5.54	2,486	1195	2.52	5.54
Classic Fortran #5	5.97	2,150	1669	3.04	5.99—6.10
Classic Fortran #4	6.18	2,146	1183	2.96	6.23
Classic Fortran #3	6.33	2,146	1311	3.03	6.36—6.40
C gcc #7	6.89	2,490	1250	2.32	6.90
spectral-norm
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
* C gcc #6	0.40	3,199	1203	3.38	1.60
Classic Fortran #2	2.68	4,239	520	3.16	2.67
* C gcc #5	0.72	3,858	576	2.52	2.86
Classic Fortran #3	0.72	5,259	644	3.06	2.86—2.91
* C gcc #7	0.72	4,067	906	3.21	2.86
* C gcc #4	0.72	3,719	1145	2.49	2.86
C gcc #8	5.41	3,219	389	2.42	5.41
C gcc #3	1.43	4,080	470	2.42	5.71
* C gcc #2		Empty
mandelbrot
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
* C gcc #6	1.29	35,578	1147	2.64	5.11
Classic Fortran #7	1.44	79,483	965	2.98	5.64
C gcc #5	1.64	35,582	788	2.38	6.32
Classic Fortran #6	3.27	79,585	669	2.68	10.80
* C gcc #4	3.50	35,197	805	2.16	13.91
* C gcc #7	3.51	35,447	1000	2.60	13.94
* C gcc	3.50	35,017	828	2.23	13.94
* C gcc #3	3.55	34,873	769	2.26	14.12
C gcc #9	4.07	35,394	700	2.47	15.72
C gcc #8	25.17	2,355	412	2.29	25.18
Classic Fortran #4	10.40	79,577	626	2.70	26.84—26.88
Classic Fortran #5	45.35	45,691	528	2.56	45.36—45.41
fasta
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
C gcc #5	1.24	2,154	1286	2.42	1.25
Classic Fortran #4	2.06	2,142	1355	3.21	2.06
C gcc #2	2.77	2,204	1299	2.25	2.77
C gcc #6	0.95	3,748	1936	2.44	2.77—2.81
C gcc #7	0.83	4,514	2276	2.39	3.28
C gcc	3.71	2,421	1213	2.25	3.71
Classic Fortran #3	6.98	2,146	1217	2.98	7.05—7.16
Classic Fortran	7.19	2,142	1193	2.78	7.23—7.31
C gcc #8	8.27	2,195	839	2.20	8.31—8.37
C gcc #3		Empty
C gcc #4		Empty
k-nucleotide
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
C gcc	3.58	135,234	1512	2.82	12.06—12.40
Classic Fortran		Empty
reverse-complement
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
* C gcc #7	0.44	514,208	1899	3.13	0.62
C gcc #9	0.49	514,159	1551	2.20	0.78
C gcc #6	0.97	693,969	828	2.26	1.37
C gcc #5	1.54	1,020,662	654	2.05	1.54
C gcc #2	1.07	1,021,755	757	2.15	1.59
* C gcc #4	3.70	514,077	716	2.22	3.71
Classic Fortran	4.24	1,012,376	1026	2.89	4.25
Classic Fortran #2	45.32	790,282	778	3.25	45.50—45.79
binary-trees
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
C gcc #2	1.56	174,780	816	3.21	4.30—4.45
C gcc #3	1.96	138,711	842	2.94	4.79—4.93
Classic Fortran #2	2.22	141,066	1155	2.78	6.99—7.03
C gcc #8	20.77	293,605	607	2.35	20.88—21.13
C gcc	21.21	272,065	660	2.37	21.39—21.70
C gcc #5	8.71	361,587	914	2.34	31.85—32.27
Classic Fortran	32.31	540,062	780	2.66	32.35—32.48
pidigits
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
C gcc #2	0.74	4,006	422	2.25	0.74
* Classic Fortran #4	0.74	5,399	987	2.35	0.74
C gcc	0.75	3,727	459	2.30	0.75
regex-redux
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
C gcc #5	0.81	157,463	1403	2.47	2.05
* Classic Fortran	0.98	179,618	2229	3.02	3.11—3.15
C gcc #2	3.22	106,713	1121	2.14	3.22
C gcc #4	0.97	157,417	1237	2.18	3.30
C gcc #3	1.73	107,401	1273	2.27	3.32
C gcc	gcc (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Classic Fortran	Fortran Compiler Classic 2021.12.0 20240222