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	2.18	19,788	1582	8.63
C clang #4	13.08	19,660	1190	13.08
C clang #5	8.31	19,784	917	32.84
Chapel #2	8.39	19,772	737	33.40
C clang #2	8.85	19,660	1563	34.65
C clang #3	34.83	19,788	574	34.83
C clang	37.30	19,660	514	37.29
n-body
source	secs	mem	gz	cpu secs
C clang #9	2.19	19,684	1639	2.19
Chapel #3	3.89	19,648	967	3.90
C clang #4	4.84	19,808	1496	4.84
C clang #5	4.85	19,808	1436	4.85
C clang #6	5.44	19,684	1186	5.44
C clang #8	5.56	19,680	1398	5.56
C clang #2	5.57	19,684	1270	5.57
C clang	5.65	19,684	1179	5.65
Chapel #2	5.65	19,648	977	5.65
C clang #3	6.13	19,812	1214	6.13
C clang #7	6.70	19,812	1250	6.70
spectral-norm
source	secs	mem	gz	cpu secs
C clang #6	0.39	19,812	1203	1.55
C clang #8	0.72	19,684	941	2.87
C clang #5	0.72	19,812	576	2.87
C clang #4	0.73	19,812	1145	2.89
Chapel #2	0.74	19,648	348	2.89
C clang	5.39	19,684	390	5.39
C clang #3	1.44	19,812	470	5.74
Chapel	1.47	19,776	322	5.79
C clang #7	2.24	19,684	906	8.92
mandelbrot
source	secs	mem	gz	cpu secs
Chapel #3	1.17	37,760	582	4.64
C clang #9	1.29	34,432	700	5.12
C clang #8	1.53	34,688	788	6.10
C clang	3.48	33,280	828	13.89
C clang #4	3.49	34,176	805	13.92
C clang #7	3.57	34,048	1000	14.16
C clang #3	3.57	33,152	769	14.23
C clang #2	25.43	19,680	412	25.43
Chapel	6.66	37,632	447	26.42
C clang #6		Make Error
pidigits
source	secs	mem	gz	cpu secs
Chapel #4	0.75	19,648	515	0.76
Chapel #2	0.75	19,776	423	0.76
C clang #2	0.81	19,684	422	0.81
C clang	0.88	19,684	459	0.88
regex-redux
source	secs	mem	gz	cpu secs
C clang #5	0.81	154,520	1403	2.80
C clang #2	3.21	103,424	1121	3.21
C clang #4	0.96	154,248	1237	3.72
C clang #3	1.76	105,856	1273	4.33
Chapel #3	3.74	552,796	503	4.68
Chapel #2	4.53	552,788	498	5.47
fasta
source	secs	mem	gz	cpu secs
C clang #9	0.78	19,804	1469	0.78
Chapel #6	0.79	19,648	1108	0.80
C clang #5	1.08	19,672	1286	1.08
C clang #8	2.41	19,680	1299	2.41
C clang #6	1.01	19,808	1936	2.98
C clang #2	0.83	19,676	2276	3.31
C clang #7	0.86	19,676	2018	3.31
Chapel #5	0.95	19,772	1391	3.47
Chapel #3	4.01	19,772	1219	4.02
C clang #3	4.48	19,676	825	4.48
C clang #4		Make Error
C clang		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C clang	6.22	129,140	1512	13.57
Chapel #4	4.96	192,256	1071	17.07
Chapel #3	5.86	192,256	1040	20.64
reverse-complement
source	secs	mem	gz	cpu secs
C clang #7	0.43	499,876	1899	0.59
C clang #8	0.46	500,004	1551	0.69
C clang #2	1.13	994,432	757	1.64
C clang #5	2.04	994,176	654	2.04
Chapel #8	0.95	1,057,024	1260	2.74
Chapel #3	1.68	1,618,560	709	3.23
Chapel #5	1.79	1,884,928	554	3.30
C clang #4	3.77	500,480	716	3.77
C clang #6	0.98	706,852	828	3.89
binary-trees
source	secs	mem	gz	cpu secs
C clang #2	1.64	170,112	816	5.26
C clang #3	1.82	134,144	842	5.67
C clang	17.12	264,192	660	17.11
Chapel #3	8.69	367,360	494	29.22
C clang #5	8.87	351,360	914	31.91
C clang	Ubuntu clang version 17.0.2
Chapel	chpl version 2.0.0 built with LLVM version 17.0.2 Copyright 2020-2024 Hewlett Packard Enterprise Development LP Copyright 2004-2019 Cray Inc.