C clang versus Chapel

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
* C clang #6	2.25	8.88	2,933	1582	5.56
* C clang #4	13.39	13.39	2,343	1190	5.32
C clang #5	8.10	32.01—32.15	4,792	917	5.61
Chapel #2	8.46	33.59—33.63	9,650	737	20.85
* C clang #2	8.68	34.14—34.46	2,703	1563	5.59
C clang #3	34.14	34.19—34.26	2,351	574	5.16
C clang #8	36.35	36.38—36.47	2,347	483	5.08
C clang	36.52	36.54—36.63	2,347	514	5.39
n-body
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C clang #9	2.20	2.20	2,494	1639	6.10
Chapel #3	3.61	3.58	9,953	983	19.99
Chapel #4	4.69	4.66	9,826	1027	20.37
* C clang #5	4.86	4.86	2,417	1436	5.03
C clang #6	5.17	5.17	2,970	1186	5.19
C clang	5.38	5.40	2,974	1179	5.35
C clang #2	5.43	5.44	2,982	1270	5.30
* C clang #4	5.60	5.61	2,941	1398	6.20
C clang #8	5.70	5.70—5.75	2,941	1195	5.20
Chapel #2	5.74	5.72	9,679	977	20.52
C clang #3	6.13	6.13	2,978	1214	5.65
C clang #7	6.78	6.79	2,974	1250	5.16
spectral-norm
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C clang #6	0.39	1.52—1.56	4,706	1203	6.40
* C clang #5	0.73	2.87	5,206	576	5.85
* C clang #4	0.73	2.88—2.92	5,366	1145	5.86
* C clang #2	0.73	4.15—6.50	5,411	941	6.35
Chapel #2	0.78	2.91	10,052	348	20.39
C clang #8	5.41	5.42	3,211	389	5.20
C clang #3	1.45	5.74	5,390	470	5.53
Chapel	1.50	5.77—5.81	10,076	322	20.39
* C clang #7	1.85	8.31—9.99	5,399	906	6.27
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Chapel #3	1.18	4.52	42,156	582	21.30
C clang #9	1.23	4.91	36,614	700	5.36
C clang #5	1.54	6.10	36,893	788	5.17
* C clang #4	3.49	13.85—13.93	36,458	805	5.13
* C clang	3.50	13.95	35,627	828	5.30
* C clang #7	3.53	14.02	36,758	1000	5.70
* C clang #3	3.56	14.16—14.22	35,484	769	5.23
C clang #8	25.48	25.50—25.55	2,359	412	5.04
Chapel	6.69	26.49	41,697	447	20.90
* C clang #6		Empty
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C clang #3	0.78	0.78	2,257	1469	5.10
Chapel #6	0.83	0.81	10,146	1108	21.02
C clang #5	1.20	1.20	2,208	1286	5.41
C clang #2	2.44	2.44	2,200	1299	5.46
C clang #6	1.05	3.05	5,104	1936	5.36
C clang #7	0.83	3.28—3.32	5,947	2276	5.40
C clang	3.47	3.47	2,396	1213	5.07
Chapel #5	1.00	3.52—3.57	11,317	1391	22.71
Chapel #3	4.08	4.05	9,834	1219	22.42
C clang #8	8.09	8.19—8.30	2,200	839	4.95
C clang #4		Empty
k-nucleotide
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C clang	6.34	13.99—14.10	134,189	1512	5.85
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
reverse-complement
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C clang #7	0.46	0.65	514,040	1899	6.27
C clang #9	0.48	0.72	514,277	1551	5.42
C clang #2	1.19	1.72	1,021,899	757	5.27
C clang #5	2.01	2.07—2.12	1,020,629	654	5.18
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
* C clang #4	3.79	3.80	514,073	716	5.07
C clang #6	1.08	4.26—4.30	699,249	828	5.14
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C clang #2	1.68	5.26—6.08	176,222	816	2.58
C clang #3	1.92	5.90	138,723	842	5.80
Chapel #5	2.09	7.32	1,825,436	646	19.70
C clang	17.86	17.75—18.31	271,938	660	5.22
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
C clang #5	9.24	33.44—33.54	361,550	914	5.00
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C clang #2	0.74	0.74	3,990	422	5.46
C clang	0.75	0.75	3,719	459	5.06
* 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
C clang #5	0.84	2.84	159,756	1403	5.28
C clang #2	3.23	3.23	106,799	1121	5.07
C clang #4	1.00	3.84—3.89	159,789	1237	5.30
Chapel #3	3.17	4.09—4.16	391,320	503	21.36
C clang #3	1.76	4.33—4.37	109,871	1273	5.44
Chapel #2	3.60	4.52	391,303	498	21.07
C clang	Ubuntu clang version 19.1.1 (1ubuntu1)
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.