C clang versus Chapel 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	2.25	19,940	1582	8.89
C clang #4	13.18	19,684	1190	13.18
C clang #5	8.08	19,940	917	31.87
Chapel #2	8.38	19,860	737	33.41
C clang #3	34.04	19,684	574	34.04
C clang #2	8.88	19,684	1563	34.87
C clang	37.45	19,684	514	37.45
n-body
source	secs	mem	gz	cpu secs
C clang #9	2.20	19,684	1639	2.20
Chapel #3	3.86	19,860	983	3.87
Chapel #4	4.29	19,680	1027	4.30
C clang #4	4.63	19,684	1496	4.63
C clang #5	4.86	19,684	1436	4.86
C clang #6	5.32	19,684	1186	5.32
C clang #2	5.50	19,684	1270	5.50
C clang	5.51	19,716	1179	5.51
C clang #8	5.59	19,748	1398	5.59
Chapel #2	5.67	19,680	977	5.67
C clang #3	6.12	19,684	1214	6.11
C clang #7	6.77	19,684	1250	6.77
spectral-norm
source	secs	mem	gz	cpu secs
C clang #6	0.40	20,980	1203	1.57
C clang #5	0.72	19,700	576	2.87
Chapel #2	0.73	19,680	348	2.88
C clang #8	0.73	19,700	941	2.88
C clang #4	0.73	20,820	1145	2.89
C clang	5.40	19,700	390	5.40
C clang #3	1.44	20,916	470	5.75
Chapel	1.46	19,680	322	5.77
C clang #7	1.84	20,756	906	7.28
mandelbrot
source	secs	mem	gz	cpu secs
C clang #9	1.23	34,304	700	4.89
Chapel #3	1.29	37,760	582	5.11
C clang #8	1.53	34,688	788	6.09
C clang #4	3.47	34,176	805	13.83
C clang	3.49	33,024	828	13.92
C clang #7	3.53	34,048	1000	14.02
C clang #3	3.58	32,896	769	14.26
C clang #2	25.50	19,684	412	25.49
Chapel	6.64	37,760	447	26.46
C clang #6		Make Error
pidigits
source	secs	mem	gz	cpu secs
Chapel #4	0.76	19,680	515	0.76
Chapel #2	0.76	19,680	423	0.77
C clang #2	0.82	19,780	422	0.82
C clang	0.88	19,876	459	0.88
regex-redux
source	secs	mem	gz	cpu secs
C clang #5	0.82	154,520	1403	2.82
C clang #2	3.22	103,424	1121	3.22
C clang #4	0.97	154,248	1237	3.77
Chapel #3	3.08	405,120	503	4.02
C clang #3	1.74	105,728	1273	4.32
Chapel #2	3.58	404,480	498	4.51
fasta
source	secs	mem	gz	cpu secs
C clang #9	0.78	19,684	1469	0.78
Chapel #6	0.79	19,680	1108	0.80
C clang #5	1.19	19,684	1286	1.19
C clang #8	2.43	19,684	1299	2.43
C clang #6	1.01	19,684	1936	2.96
C clang #2	0.82	19,684	2276	3.26
C clang #7	0.85	19,684	2018	3.31
Chapel #5	0.95	19,680	1391	3.46
C clang	3.61	19,860	1213	3.61
Chapel #3	3.98	19,680	1219	3.99
C clang #3	4.58	19,860	825	4.58
C clang #4		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C clang	6.37	129,248	1512	13.99
Chapel #4	4.97	197,760	1071	17.15
Chapel #3	5.96	198,144	1040	20.81
reverse-complement
source	secs	mem	gz	cpu secs
C clang #7	0.44	499,748	1899	0.61
C clang #8	0.46	499,876	1551	0.70
C clang #2	1.15	994,560	757	1.67
C clang #5	2.07	994,176	654	2.07
Chapel #8	0.96	1,057,024	1260	2.77
Chapel #5	1.82	1,905,152	554	3.16
Chapel #3	1.84	2,121,344	709	3.24
C clang #4	3.79	500,480	716	3.79
C clang #6	1.02	706,096	828	4.04
binary-trees
source	secs	mem	gz	cpu secs
C clang #2	1.64	170,112	816	5.30
C clang #3	1.84	134,144	842	5.79
C clang	17.79	264,064	660	17.79
Chapel #3	8.47	300,928	494	25.54
Chapel #4	7.13	477,824	489	26.17
C clang #5	9.39	351,232	914	33.96
C clang	Ubuntu clang version 18.1.3
Chapel	chpl version 2.1.0 built with LLVM version 18.1.3 Copyright 2020-2024 Hewlett Packard Enterprise Development LP Copyright 2004-2019 Cray Inc.