Racket versus Java fastest programs Always look at the source code. These are only the fastest programs. Look at the other programs. They may seem more-like a fair comparison to you. pidigits source secs mem gz busy cpu load Racket 2.27 36,624 1136 2.30 100% 0% 1% 0% Java 1.83 34,848 764 1.95 99% 1% 4% 2% spectral-norm source secs mem gz busy cpu load Racket 6.25 38,976 627 23.69 94% 94% 97% 94% Java 4.15 36,428 950 16.26 98% 100% 98% 97% binary-trees source secs mem gz busy cpu load Racket 16.20 980,880 853 45.85 57% 75% 75% 76% Java 8.28 948,040 835 28.20 80% 84% 87% 90% n-body source secs mem gz busy cpu load Racket 53.89 36,784 1689 56.81 35% 1% 5% 65% Java 21.85 34,112 1489 22.16 1% 0% 0% 100% regex-redux source secs mem gz busy cpu load Racket 26.20 1,242,924 729 57.35 65% 51% 17% 86% Java 10.27 635,500 740 29.42 74% 81% 55% 76% mandelbrot source secs mem gz busy cpu load Racket 19.92 128,228 801 75.95 95% 96% 95% 96% Java 6.84 76,008 796 26.90 99% 98% 98% 98% fannkuch-redux source secs mem gz busy cpu load Racket 83.41 35,220 1101 326.64 100% 99% 94% 99% Java 16.12 33,168 1282 63.71 100% 98% 99% 98% reverse-complement source secs mem gz busy cpu load Racket 17.41 568,032 1030 22.12 15% 3% 100% 9% Java 3.27 714,144 2183 7.54 47% 60% 66% 58% fasta source secs mem gz busy cpu load Racket 19.46 36,716 1280 21.43 93% 7% 2% 8% Java 2.22 43,096 2473 6.10 67% 83% 45% 80% k-nucleotide source secs mem gz busy cpu load Racket 100.10 417,588 885 105.50 3% 1% 4% 97% Java 9.14 403,576 1812 29.10 87% 72% 74% 86% Racket Welcome to Racket v7.7. Java openjdk 14 2020-03-17 OpenJDK Runtime Environment (build 14+36-1461) OpenJDK 64-Bit Server VM (build 14+36-1461, mixed mode, sharing) all Racket programs & measurements all Java programs & measurements