The Computer Language
24.06 Benchmarks Game

Rust versus Swift 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
Rust #6 3.82 19,684 1260 15.13
Rust #4 7.58 19,684 1026 29.78
Rust #5 8.00 19,684 1023 31.31
Swift 33.92 19,656 457 33.91
Swift #3 8.57 19,656 1103 33.94
Rust #2 9.23 19,684 1198 36.15
n-body
source secs mem gz cpu secs
Rust #9 2.16 19,716 1881 2.16
Rust #7 3.24 19,700 1759 3.24
Rust #2 3.94 19,700 1809 3.94
Rust #6 4.32 19,716 1796 4.32
Rust #8 4.49 19,684 1774 4.49
Rust #5 5.02 19,716 2224 5.02
Rust #4 5.18 19,716 1810 5.18
Swift #4 5.49 19,688 1361 5.49
Rust 5.51 19,716 1483 5.51
Swift #5 5.52 19,688 1372 5.52
Swift #7 5.54 19,700 1333 5.54
Rust #3 5.56 19,716 1546 5.56
Swift #6 5.99 19,700 1200 5.99
Swift #8 6.00 19,684 1688 5.99
Swift #3 8.12 19,688 1210 8.12
Swift #2 9.54 19,684 1198 9.54
Swift #9 287.21 19,688 1532 287.20
spectral-norm
source secs mem gz cpu secs
Rust #6 0.72 19,780 1132 2.85
Rust #5 0.72 19,748 1062 2.85
Rust #7 0.72 19,748 938 2.85
Rust #4 0.72 19,812 823 2.85
Rust 0.79 19,748 1262 3.02
Rust #2 0.78 19,748 1117 3.04
Rust #3 0.92 19,748 1060 3.56
Swift 5.33 20,308 444 5.33
Swift #3 1.43 20,084 607 5.69
mandelbrot
source secs mem gz cpu secs
Rust #4 0.94 33,280 1301 3.73
Rust #6 1.07 34,048 1338 4.21
Rust #8 1.06 33,152 770 4.22
Rust #7 1.06 33,280 763 4.23
Rust #5 1.14 33,920 725 4.46
Rust #3 1.14 19,684 1013 4.54
Swift #7 1.34 47,104 1147 5.30
Swift #6 1.45 50,048 1147 5.75
Rust 2.04 39,168 874 7.88
Swift 26.47 19,664 400 26.47
Swift #5 7.24 43,392 665 27.01
Swift #3   Bad Output  
pidigits
source secs mem gz cpu secs
Rust #4 0.71 19,720 804 0.71
Rust #3 0.88 19,720 1373 0.88
Rust #2 0.89 19,720 1312 0.88
Rust 0.89 19,720 1426 0.89
Swift #2 0.89 19,700 606 0.89
regex-redux
source secs mem gz cpu secs
Rust #6 1.19 153,464 994 1.44
Rust #5 1.30 202,600 777 1.54
Rust 1.31 153,796 811 1.57
Rust #4 1.34 199,556 771 1.59
Rust #3 1.33 202,916 726 1.59
Rust #2 1.37 153,780 707 1.61
Rust #7 0.78 150,528 2464 2.00
Swift #2 42.42 684,644 678 42.42
Swift 24.44 889,924 721 43.38
Swift #4 20.99 1,055,220 751 44.94
fasta
source secs mem gz cpu secs
Rust #7 0.77 19,684 2533 1.54
Rust #3 1.99 19,684 1235 1.99
Rust #8 0.94 19,684 1952 3.26
Rust #2 0.92 19,684 1910 3.33
Rust #5 0.92 19,684 1963 3.40
Rust #4 3.45 123,656 944 3.45
Rust #6 3.50 123,656 959 3.50
Rust 4.17 19,684 1240 4.17
Swift #2 3.14 19,664 1952 5.14
Swift 5.16 19,664 1533 5.16
Swift #3 2.18 29,456 2097 5.35
k-nucleotide
source secs mem gz cpu secs
Rust #7 2.85 133,876 1585 8.96
Rust #8 3.77 137,492 1549 10.88
Rust #6 3.01 159,340 1697 10.96
Rust #5 4.17 137,816 1745 12.38
Rust #2 6.30 138,236 1350 16.32
Rust #9 6.39 135,948 1850 17.33
Rust #4 6.57 137,384 1755 17.75
Swift #2 14.61 259,048 1373 55.63
Rust 22.83 157,276 1086 69.30
Swift   Make Error  
reverse-complement
source secs mem gz cpu secs
Rust 0.52 498,688 2762 0.82
Rust #2 0.95 995,200 1332 1.59
Rust #3 0.96 995,200 1105 1.65
Swift 1.95 796,836 1293 2.38
binary-trees
source secs mem gz cpu secs
Rust #5 1.10 198,528 771 3.84
Rust #2 1.24 199,684 729 4.40
Rust #4 1.31 181,692 765 4.74
Rust #3 1.43 194,868 762 5.18
Rust 2.04 132,736 760 7.18
Swift #5 14.19 736,000 813 42.47
Swift #2 13.67 705,152 822 43.96
Swift #3 13.67 705,408 868 44.28
Swift 20.52 735,360 720 60.79
Swift #4 19.86 705,280 772 63.33
Swift #9   Make Error  
Rust

1.78.0
(9b00956e5
2024-04-29)
LLVM version: 18.1.2

Swift

Swift version 5.10
(swift-5.10-RELEASE)