Chapel versus Intel Fortran

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
Chapel #2	8.46	33.59—33.63	9,650	737	20.85
Intel Fortran #3	9.67	38.56	12,128	1164	5.02
Intel Fortran	40.21	40.21	2,179	608	3.95
n-body
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel Fortran #5	3.39	3.40	2,146	1669	4.48
Chapel #3	3.61	3.58	9,953	983	19.99
Intel Fortran #2	4.46	4.42—4.69	2,146	1507	4.33
Intel Fortran	4.55	4.55	2,142	1400	4.41
Chapel #4	4.69	4.66	9,826	1027	20.37
Intel Fortran #3	4.72	4.69—4.82	2,154	1311	4.43
Intel Fortran #6	4.99	4.64—6.08	2,052	1530	4.43
Chapel #2	5.74	5.72	9,679	977	20.52
Intel Fortran #4		Bad Output
spectral-norm
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel Fortran #2	2.67	2.67	2,331	520	5.05
Intel Fortran #3	0.72	2.88—2.92	5,214	644	4.80
Chapel #2	0.78	2.91	10,052	348	20.39
Chapel	1.50	5.77—5.81	10,076	322	20.39
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Chapel #3	1.18	4.52	42,156	582	21.30
Intel Fortran #6	2.72	8.55	85,975	669	4.13
Intel Fortran #7	4.09	16.19	85,639	965	5.17
Intel Fortran #4	9.89	25.29—25.33	86,360	626	3.95
Chapel	6.69	26.49	41,697	447	20.90
Intel Fortran #5	32.66	32.67	47,174	528	3.72
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Chapel #6	0.83	0.81	10,146	1108	21.02
Intel Fortran #4	1.36	1.37	2,142	1355	4.44
Chapel #5	1.00	3.52—3.57	11,317	1391	22.71
Chapel #3	4.08	4.05	9,834	1219	22.42
Intel Fortran	6.01	6.05—6.11	2,146	1193	4.34
Intel Fortran #3	6.53	6.57—6.65	2,142	1217	4.47
k-nucleotide
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Chapel #4	4.99	17.17—18.03	194,023	1074	28.96
Chapel #3	5.99	22.14—23.26	187,892	1044	28.36
Intel Fortran		Empty
reverse-complement
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Chapel #9	1.03	2.84—2.88	1,087,701	1260	20.81
Chapel #5	1.86	3.28—3.43	1,442,660	554	20.80
Chapel #3	1.85	3.35—3.53	1,669,710	709	20.38
Intel Fortran	3.35	3.36	1,012,519	1026	4.53
Intel Fortran #2	45.22	45.34—45.58	790,307	778	4.10
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel Fortran #2	2.24	6.89—7.00	148,124	1155	4.32
Chapel #5	2.09	7.32	1,825,436	646	19.70
Chapel #3	8.63	25.95—26.01	313,868	494	10.25
Chapel #4	7.29	26.57—26.70	495,682	489	19.96
Intel Fortran	32.74	32.78—32.88	540,066	780	3.98
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel Fortran #4	0.74	0.74	6,590	987	3.94
* Chapel #4	0.80	0.77	11,600	515	19.57
Chapel #2	0.79	0.78	11,690	423	19.59
regex-redux [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel Fortran	0.98	3.11—3.15	189,305	2229	4.80
Chapel #3	3.17	4.09—4.16	391,320	503	21.36
Chapel #2	3.60	4.52	391,303	498	21.07
Chapel	chpl version 2.3.0 built with LLVM version 19.1.1 Copyright 2020-2024 Hewlett Packard Enterprise Development LP Copyright 2004-2019 Cray Inc.
Intel Fortran	ifx (IFX) 2024.1.0 20240308