Fastest cpu secs Racket versus Java 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 Java #3 35,324 1257 41.17 Java 35,824 1282 41.74 Java #2 34,244 514 44.98 Racket #2 66,616 908 111.70 Racket #3 68,148 1101 120.34 Racket 66,312 649 143.11 n-body source mem gz cpu Java #5 34,252 1429 6.79 Java #4 34,076 1489 6.79 Java #3 34,612 1430 7.50 Java #2 34,704 1424 7.50 Java 37,380 1430 7.83 Racket #2 68,496 1689 14.09 Racket 68,936 1496 40.83 spectral-norm source mem gz cpu Java #3 38,428 756 5.94 Java 37,288 514 9.76 Java #2 37,368 950 10.07 Racket #3 65,100 627 14.71 Racket #2 65,336 532 14.99 Racket 66,852 446 29.47 mandelbrot source mem gz cpu Java #4 66,304 660 16.16 Java #2 68,860 796 16.21 Java #6 67,432 802 16.92 Java 34,252 665 27.75 Java #3 69,200 903 29.18 Racket #3 65,448 802 34.63 Racket #4 103,948 801 41.19 Racket 66,768 517 49.23 Racket #2 65,576 585 51.16 pidigits source mem gz cpu Java #3 35,700 764 0.82 Racket #2 67,012 1136 1.02 Java #2 38,328 938 1.53 Java 513,728 800 8.94 Racket 71,068 453 12.25 regex-redux source mem gz cpu Java 924,116 868 17.12 Java #6 728,332 740 17.16 Java #3 741,028 929 17.34 Racket 2,074,452 541 21.84 Racket #2 2,003,760 729 22.58 fasta source mem gz cpu Java #4 36,800 1524 3.41 Java #6 42,416 2543 3.52 Java #5 42,532 2473 4.14 Java #2 36,812 1257 4.46 Racket #3 66,908 1280 7.99 Racket 66,768 1066 18.91 k-nucleotide source mem gz cpu Java 349,544 1812 16.17 Java #6 343,684 1607 25.67 Java #3 344,652 1635 25.73 Java #4 199,824 1882 37.48 Java #5 210,368 2219 43.27 Racket #4 988,500 885 63.58 Racket 2,614,596 547 199.02 reverse-complement source mem gz cpu Java #8 665,804 2183 3.49 Java #6 2,024,016 752 4.15 Java #5 1,088,392 1108 4.92 Java #3 1,170,232 1722 5.09 Java #4 1,881,900 651 5.41 Racket #2 687,976 1030 8.74 Java #7 1,030,892 1647 23.16 Racket 2,575,076 553 39.70 binary-trees source mem gz cpu Java #3 2,106,820 540 5.19 Java #6 2,093,916 529 5.35 Java #4 2,079,388 840 5.44 Java #2 1,877,464 552 5.45 Racket #3 299,864 473 6.42 Java #7 2,460,388 835 7.73 Racket #4 545,328 853 8.90 Racket #2 308,092 416 8.95 Racket 435,536 476 15.25 Racket Racket v8.5 [cs]. Java openjdk 18 2022-03-22 OpenJDK Runtime Environment (build 18+36-2087) OpenJDK 64-Bit Server VM (build 18+36-2087, mixed mode, sharing) all Racket programs & measurements all Java programs & measurements