Fastest cpu secs Swift versus C gcc

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 cpu seconds, less gz source code.

fannkuch-redux
source	mem	gz	cpu
C gcc #6	1,044	1576	8.26
C gcc #4	964	1183	13.89
C gcc #5	1,072	910	29.38
Swift #3	6,644	1097	31.59
Swift	6,456	451	35.27
C gcc #3	1,016	567	42.18
C gcc	988	508	43.27
C gcc #2	1,140	1557	45.01
n-body
source	mem	gz	cpu
C gcc #9	992	1633	2.12
C gcc #8	8	1391	4.10
C gcc #4	1,304	1490	4.44
Swift #4	14,076	1355	5.28
Swift #5	10,800	1365	5.29
Swift #7	14,024	1326	5.33
Swift #8	14,028	1681	5.70
C gcc #5	1,020	1429	6.10
Swift #6	6,356	1194	6.11
C gcc #7	1,300	1244	6.79
C gcc #2	1,264	1263	7.19
C gcc #6	1,304	1180	7.21
C gcc #3	1,304	1208	7.23
C gcc	1,264	1173	7.55
Swift #3	6,452	1204	8.11
Swift #2	6,420	1192	8.68
Swift #9	14,032	1526	292.55
spectral-norm
source	mem	gz	cpu
C gcc #6	1,068	1197	1.57
C gcc #5	1,344	569	2.85
C gcc #4	1,352	1139	2.85
Swift	12,872	438	5.32
C gcc	1,248	383	5.38
C gcc #3	1,348	463	5.68
Swift #3	6,876	601	5.68
mandelbrot
source	mem	gz	cpu
C gcc #6	31,244	1135	5.12
Swift #7	41,804	1140	5.29
Swift #6	44,504	1141	5.43
C gcc #8	33,068	782	6.29
C gcc #4	32,704	799	13.81
C gcc #7	33,108	994	13.87
C gcc	29,692	822	13.91
C gcc #3	29,840	763	13.99
C gcc #9	32,904	694	16.03
C gcc #2	1,040	400	25.30
Swift	6,484	394	26.22
Swift #5	41,620	659	26.91
Swift #3		Bad Output
pidigits
source	mem	gz	cpu
C gcc	2,648	452	0.73
C gcc #2	2,920	416	0.74
Swift #2	8,132	600	0.74
regex-redux
source	mem	gz	cpu
C gcc #5	152,220	1397	2.02
C gcc #2	103,084	1115	3.23
C gcc #4	152,056	1230	3.24
C gcc #3	103,540	1266	3.31
Swift #2	682,836	671	43.47
Swift	879,156	715	44.12
Swift #4	1,061,888	745	45.38
fasta
source	mem	gz	cpu
C gcc #9	1,256	1463	0.78
C gcc #5	1,052	1281	1.30
C gcc #8	1,044	1293	2.74
C gcc #6	2,140	1930	2.76
C gcc #4	1,020	1240	3.06
Swift #2	7,440	1945	3.17
C gcc #2	2,860	2268	3.25
C gcc #7	2,864	2011	3.28
C gcc	1,016	1206	3.67
C gcc #3	972	819	4.49
Swift	6,908	1526	4.52
Swift #3	26,916	2090	4.64
k-nucleotide
source	mem	gz	cpu
C gcc	130,156	1506	12.31
Swift #2	257,052	1367	52.46
Swift		Make Error
reverse-complement
source	mem	gz	cpu
C gcc #7	499,132	1965	0.57
C gcc #8	499,184	1627	0.77
C gcc #6	688,416	820	1.27
C gcc #5	994,088	647	1.42
C gcc #2	994,152	750	1.45
Swift	794,484	1286	2.26
C gcc #4	500,416	709	3.49
binary-trees
source	mem	gz	cpu
C gcc #2	168,384	809	4.32
C gcc #3	134,068	836	4.71
C gcc	263,664	654	22.16
C gcc #5	351,304	908	32.02
Swift #5	733,388	806	41.37
Swift #3	700,092	862	43.45
Swift #2	699,876	816	44.09
Swift	733,908	714	59.11
Swift #4	700,512	765	60.93
Swift #9		Make Error
Swift	Swift version 5.7-dev (LLVM a177fc627109410, Swift 31967c6df177cce)
C gcc	11.2.0-19ubuntu1