Racket versus Racket CS 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. mandelbrot source secs mem gz busy cpu load Racket 19.92 128,228 801 75.95 95% 96% 95% 96% Racket CS 268.34 135,592 801 970.79 90% 90% 91% 91% spectral-norm source secs mem gz busy cpu load Racket 6.25 38,976 627 23.69 94% 94% 97% 94% Racket CS 64.15 84,492 627 236.14 92% 92% 92% 92% n-body source secs mem gz busy cpu load Racket 53.89 36,784 1689 56.81 35% 1% 5% 65% Racket CS 128.14 85,160 1496 136.08 35% 62% 4% 5% pidigits source secs mem gz busy cpu load Racket 2.27 36,624 1136 2.30 100% 0% 1% 0% Racket CS 2.56 85,612 1136 2.68 0% 4% 100% 0% k-nucleotide source secs mem gz busy cpu load Racket 100.10 417,588 885 105.50 3% 1% 4% 97% Racket CS 108.77 1,138,756 885 115.69 2% 2% 31% 71% regex-redux source secs mem gz busy cpu load Racket 26.20 1,242,924 729 57.35 65% 51% 17% 86% Racket CS 28.36 1,497,968 729 48.69 49% 54% 30% 39% reverse-complement source secs mem gz busy cpu load Racket 17.41 568,032 1030 22.12 15% 3% 100% 9% Racket CS 17.93 735,856 1030 19.01 1% 3% 10% 92% fasta source secs mem gz busy cpu load Racket 19.46 36,716 1280 21.43 93% 7% 2% 8% Racket CS 19.52 83,280 1280 20.80 3% 2% 30% 71% binary-trees source secs mem gz busy cpu load Racket 16.20 980,880 853 45.85 57% 75% 75% 76% Racket CS 13.31 348,572 473 14.51 2% 5% 72% 29% fannkuch-redux source secs mem gz busy cpu load Racket 83.41 35,220 1101 326.64 100% 99% 94% 99% Racket CS 60.51 82,380 1101 234.11 95% 99% 95% 97% Racket Welcome to Racket v7.7. Racket CS Welcome to Racket v7.7.0.4 [cs]. all Racket programs & measurements all Racket CS programs & measurements