Racket versus Java fastest performance 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 Java #3 40.36 39,932 1257 40.43 Java 10.71 40,324 1282 42.25 Java #2 46.85 38,492 514 46.91 Racket #2 112.85 69,308 908 112.85 Racket #3 30.68 71,424 1101 116.70 Racket 140.73 69,084 649 140.73 n-body source secs mem gz cpu secs Java #5 6.77 40,632 1429 6.82 Java #4 6.86 40,516 1489 6.89 Java #2 7.32 40,508 1424 7.37 Java #3 7.38 40,492 1430 7.43 Java 7.76 40,724 1430 7.80 Racket #2 14.11 69,380 1689 14.11 Racket 40.98 69,484 1496 40.98 spectral-norm source secs mem gz cpu secs Java #3 1.54 42,324 756 5.93 Java 7.02 41,448 514 7.09 Java #2 2.39 41,092 950 9.25 Racket #3 3.83 66,808 627 14.73 Racket #2 15.00 67,848 532 14.99 Racket 29.49 67,340 446 29.49 mandelbrot source secs mem gz cpu secs Java #4 4.39 101,236 660 16.12 Java #2 4.11 83,924 796 16.21 Java #6 4.27 84,532 802 16.86 Java 25.66 40,860 665 25.73 Java #3 7.37 88,056 903 29.24 Racket #3 34.63 68,008 802 34.63 Racket #4 10.45 126,756 801 41.21 Racket 49.21 67,484 517 49.21 Racket #2 51.15 66,340 585 51.14 pidigits source secs mem gz cpu secs Java #3 0.92 38,380 764 0.95 Racket #2 1.19 68,388 1136 1.19 Java #2 1.34 41,352 938 1.42 Java 7.44 430,616 800 8.45 Racket 12.45 71,504 453 12.45 regex-redux source secs mem gz cpu secs Java 8.58 767,552 868 16.68 Java #6 5.40 637,728 740 17.08 Java #3 5.45 736,544 929 17.42 Racket 23.71 1,305,156 541 23.70 Racket #2 13.79 1,507,508 729 24.67 fasta source secs mem gz cpu secs Java #4 3.17 40,400 1524 3.27 Java #6 1.16 46,068 2543 3.65 Java #5 1.23 46,180 2473 3.79 Java #2 4.32 44,708 1257 4.45 Racket #3 8.00 67,800 1280 8.00 Racket 19.20 67,316 1066 19.20 k-nucleotide source secs mem gz cpu secs Java 5.03 361,196 1812 16.40 Java #6 7.17 357,700 1607 25.04 Java #3 7.12 357,568 1635 25.06 Java #4 35.38 201,052 1882 35.83 Java #5 18.82 208,376 2219 40.84 Racket #4 61.49 858,184 885 61.46 Racket 198.95 2,674,436 547 196.69 reverse-complement source secs mem gz cpu secs Java #6 3.02 2,027,152 752 3.69 Java #5 4.46 1,094,060 1108 4.58 Java #4 5.51 1,886,052 651 5.62 Java #7 24.15 1,032,956 1647 6.20 Racket #2 8.88 892,920 1030 8.88 Racket 40.81 2,041,148 553 40.81 Java #3 Bad Output Java #8 Bad Output binary-trees source secs mem gz cpu secs Java #4 4.47 2,116,292 840 5.15 Java #6 4.88 2,058,280 529 5.59 Java #3 4.91 2,101,240 540 5.61 Java #2 5.05 2,095,888 552 5.73 Racket #3 6.47 317,704 473 6.47 Java #7 2.52 1,726,148 835 7.89 Racket #2 9.22 318,236 416 9.22 Racket #4 4.86 481,644 853 9.34 Racket 15.89 526,568 476 15.89 Racket Racket v8.7 [cs]. Java openjdk 20 2023-03-21 OpenJDK Runtime Environment (build 20+36-2344) OpenJDK 64-Bit Server VM (build build 20+36-2344 mixed mode, sharing) all Racket programs & measurements all Java programs & measurements