Chapel versus Intel 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
Chapel #2	8.48	9,699	737	21.01	33.63—33.69
Intel Fortran #3	9.67	12,128	1164	5.02	38.56
Intel Fortran	40.21	2,179	608	3.95	40.21
n-body
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Intel Fortran #5	3.39	2,146	1669	4.48	3.40
Chapel #3	3.61	9,720	983	20.46	3.58
Intel Fortran #2	4.46	2,146	1507	4.33	4.42—4.69
Intel Fortran	4.55	2,142	1400	4.41	4.55
Chapel #4	4.68	9,568	1027	20.35	4.66
Intel Fortran #3	4.72	2,154	1311	4.43	4.69—4.82
Intel Fortran #6	4.99	2,052	1530	4.43	4.64—6.08
Chapel #2	5.74	9,929	977	20.76	5.72
Intel Fortran #4		Bad Output
spectral-norm
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Intel Fortran #2	2.67	2,331	520	5.05	2.67
Intel Fortran #3	0.72	5,214	644	4.80	2.88—2.92
Chapel #2	0.79	9,916	348	20.86	2.91
Chapel	1.50	10,109	322	20.65	5.78
mandelbrot
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Chapel #3	1.18	42,295	582	21.29	4.52
Intel Fortran #6	2.72	85,975	669	4.13	8.55
Intel Fortran #7	4.09	85,639	965	5.17	16.19
Intel Fortran #4	9.89	86,360	626	3.95	25.29—25.33
Chapel	6.68	41,964	447	20.87	26.49
Intel Fortran #5	32.66	47,174	528	3.72	32.67
fasta
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Chapel #6	0.84	10,310	1108	21.24	0.81
Intel Fortran #4	1.36	2,142	1355	4.44	1.37
Chapel #5	1.01	11,284	1391	22.88	3.54—3.60
Chapel #3	4.07	9,597	1219	22.91	4.05
Intel Fortran	6.01	2,146	1193	4.34	6.05—6.11
Intel Fortran #3	6.53	2,142	1217	4.47	6.57—6.65
k-nucleotide
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Chapel #4	5.02	197,980	1074	28.32	16.99—17.77
Chapel #3	5.99	190,841	1044	28.35	20.72—21.61
Intel Fortran		Empty
reverse-complement
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Chapel #9	1.00	1,087,742	1260	21.34	2.82—2.88
Chapel #5	1.83	1,442,632	554	20.72	3.23—3.45
Chapel #3	1.84	1,669,767	709	20.76	3.27—3.41
Intel Fortran	3.35	1,012,519	1026	4.53	3.36
Intel Fortran #2	45.22	790,307	778	4.10	45.34—45.58
binary-trees
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Intel Fortran #2	2.24	148,124	1155	4.32	6.89—7.00
Chapel #5	2.06	1,825,448	646	19.88	7.24
Chapel #3	8.61	314,032	494	20.69	26.00—26.04
Chapel #4	7.29	495,673	489	20.08	26.60—26.71
Intel Fortran	32.74	540,066	780	3.98	32.78—32.88
pidigits
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Intel Fortran #4	0.74	6,590	987	3.94	0.74
* Chapel #4	0.80	11,416	515	19.88	0.78
Chapel #2	0.80	11,543	423	20.04	0.78
regex-redux
	elapsed				Mean or 95% CI
source	secs	mem	gz	make	cpu secs
Intel Fortran	0.98	189,305	2229	4.80	3.11—3.15
Chapel #3	3.17	392,372	503	22.24	4.07—4.13
Chapel #2	3.58	391,442	498	21.16	4.51
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