The Computer Language
24.09 Benchmarks Game

Rust versus C++ g++ 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++ g++ #6 3.26 19,712 1535 12.91
C++ g++ #7 13.96 19,712 1156 13.96
Rust #6 3.88 19,804 1260 15.27
Rust #4 6.93 19,804 1026 27.20
Rust #5 7.66 19,804 1023 29.90
C++ g++ #5 8.00 19,712 987 31.23
Rust #2 9.15 19,804 1198 35.90
C++ g++ #4 9.26 19,688 1445 36.31
C++ g++ #3 36.90 19,688 600 36.90
C++ g++ #2 9.55 19,712 1446 37.53
C++ g++ 10.87 19,712 1065 42.73
n-body
source secs mem gz cpu secs
C++ g++ #0 2.15 19,736 1933 2.15
Rust #9 2.19 19,804 1881 2.19
Rust #7 3.25 19,804 1759 3.24
Rust #2 3.94 19,804 1809 3.94
C++ g++ #7 3.96 19,736 1815 3.96
C++ g++ #2 4.20 19,736 1884 4.20
Rust #6 4.30 19,804 1796 4.30
Rust #8 4.49 19,804 1774 4.49
Rust #5 5.01 19,804 2224 5.01
Rust #4 5.10 19,804 1810 5.10
C++ g++ #3 5.31 19,736 1402 5.31
C++ g++ #9 5.44 19,736 1536 5.44
C++ g++ #4 5.45 19,736 1434 5.45
Rust 5.51 19,804 1483 5.51
Rust #3 5.57 19,804 1546 5.57
C++ g++ #5 6.02 19,736 1544 6.01
C++ g++ 6.50 19,736 1666 6.50
C++ g++ #8 6.54 19,736 1524 6.54
C++ g++ #6 6.91 19,736 1674 6.91
spectral-norm
source secs mem gz cpu secs
C++ g++ #6 0.72 19,884 1050 2.85
Rust #6 0.72 19,804 1132 2.85
Rust #4 0.72 19,804 823 2.85
Rust #5 0.72 19,804 1062 2.85
Rust #2 0.78 19,804 1117 2.98
Rust 0.77 19,804 1262 2.99
Rust #3 0.78 19,804 1060 3.00
C++ g++ #5 1.33 19,788 1050 5.27
C++ g++ 5.37 19,852 459 5.37
C++ g++ #8 1.52 19,820 1284 6.06
Rust #7   Make Error  
mandelbrot
source secs mem gz cpu secs
C++ g++ 0.89 34,944 1797 3.47
C++ g++ #4 0.89 35,328 3554 3.47
Rust #4 0.94 33,408 1301 3.73
C++ g++ #6 0.98 35,072 1014 3.90
Rust #8 1.06 33,408 770 4.22
Rust #6 1.08 34,048 1338 4.23
Rust #7 1.06 33,408 763 4.23
Rust #5 1.13 34,048 725 4.43
Rust #3 1.14 19,860 1013 4.54
Rust 2.00 39,296 874 7.84
C++ g++ #0 2.36 35,456 2752 9.30
C++ g++ #8 4.84 34,944 749 13.21
C++ g++ #5 13.35 34,560 596 13.35
C++ g++ #9 3.50 35,072 732 13.49
C++ g++ #7 3.51 35,072 1023 13.94
C++ g++ #2 16.94 34,560 700 16.94
C++ g++ #3 27.27 19,736 421 27.27
pidigits
source secs mem gz cpu secs
Rust #4 0.71 19,804 804 0.71
Rust #3 0.74 19,804 1373 0.74
Rust 0.74 19,804 1426 0.74
Rust #2 0.74 19,804 1312 0.74
C++ g++ #5 0.87 19,736 804 0.87
C++ g++ #4 0.89 19,736 521 0.88
regex-redux
source secs mem gz cpu secs
Rust #6 1.18 154,096 994 1.44
Rust 1.33 153,792 811 1.58
Rust #5 1.34 203,224 777 1.58
Rust #2 1.34 153,776 707 1.60
Rust #4 1.35 199,548 771 1.61
Rust #3 1.36 202,908 726 1.61
Rust #7 0.78 149,888 2464 1.99
C++ g++ #6 1.18 276,148 2856 2.23
C++ g++ 3.56 212,180 662 3.56
C++ g++ #2 2.86 212,648 706 3.62
C++ g++ #5 3.81 215,648 859 4.53
C++ g++ #3 12.46 215,472 859 18.08
C++ g++ #4   Make Error  
fasta
source secs mem gz cpu secs
Rust #7 0.77 19,804 2533 1.54
C++ g++ #8 0.78 19,712 2758 1.54
C++ g++ #2 1.80 19,712 1129 1.80
C++ g++ 1.90 19,712 1064 1.90
Rust #3 1.98 19,804 1235 1.97
C++ g++ #3 2.62 19,712 1311 2.62
Rust #2 0.92 19,932 1910 3.09
Rust #8 0.93 19,804 1952 3.14
Rust #5 0.94 19,932 1963 3.14
C++ g++ #4 3.34 19,712 1291 3.34
Rust #6 3.46 123,652 959 3.45
Rust #4 3.57 123,652 944 3.57
C++ g++ #5 1.07 19,712 2345 3.67
C++ g++ #6 1.07 19,712 2326 3.85
Rust 4.24 19,804 1240 4.24
C++ g++ #7   Make Error  
k-nucleotide
source secs mem gz cpu secs
C++ g++ #2 2.02 156,512 1634 6.09
Rust #7 2.84 133,840 1585 8.91
Rust #8 3.53 137,372 1549 10.47
Rust #6 2.96 159,600 1697 10.67
Rust #5 3.96 137,844 1745 11.95
C++ g++ #3 4.18 165,384 1280 13.93
C++ g++ 7.10 757,084 1452 14.78
Rust #2 6.28 138,736 1350 16.39
Rust #9 6.44 135,800 1850 17.00
Rust #4 6.74 137,440 1755 18.30
Rust 22.54 157,124 1086 67.38
reverse-complement
source secs mem gz cpu secs
C++ g++ #2 0.71 499,712 2099 0.71
Rust 0.53 498,816 2762 0.83
Rust #2 0.98 995,200 1332 1.62
Rust #3 0.98 995,200 1105 1.68
C++ g++ #6 3.26 1,517,580 1827 4.32
C++ g++ 6.50 979,912 599 6.50
C++ g++ #5 36.24 771,432 704 36.24
C++ g++ #3   Bad Output  
binary-trees
source secs mem gz cpu secs
C++ g++ #7 0.96 201,536 896 3.35
Rust #5 1.08 198,656 771 3.77
C++ g++ #5 1.15 200,660 891 4.08
Rust #2 1.22 199,684 729 4.29
C++ g++ #9 1.65 136,064 815 4.55
C++ g++ #6 1.92 266,112 851 4.74
Rust #4 1.33 187,948 765 4.80
Rust #3 1.40 188,740 762 5.06
C++ g++ #3 2.25 265,600 951 5.11
C++ g++ #8 2.22 266,112 826 5.26
Rust 2.05 132,992 760 7.21
C++ g++ 2.68 2,068,612 760 9.34
C++ g++ #2 21.96 265,856 514 21.96
C++ g++ #4   Make Error  
Rust

1.80.1
(3f5fd8dd4
2024-08-06)
LLVM version: 18.1.7

C++ g++

Ubuntu 13.2.0-23ubuntu4