Racket versus Lisp SBCL 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% Lisp SBCL 12.37 131,624 493 12.55 0% 0% 37% 63% binary-trees source secs mem gz busy cpu load Racket 16.20 980,880 853 45.85 57% 75% 75% 76% Lisp SBCL 11.41 321,692 932 24.35 53% 73% 42% 45% reverse-complement source secs mem gz busy cpu load Racket 17.41 568,032 1030 22.12 15% 3% 100% 9% Lisp SBCL 11.42 1,390,812 904 11.59 1% 1% 49% 51% spectral-norm source secs mem gz busy cpu load Racket 6.25 38,976 627 23.69 94% 94% 97% 94% Lisp SBCL 4.00 19,808 890 15.78 98% 99% 99% 99% n-body source secs mem gz busy cpu load Racket 53.89 36,784 1689 56.81 35% 1% 5% 65% Lisp SBCL 26.19 17,660 1403 26.35 91% 9% 0% 0% fasta source secs mem gz busy cpu load Racket 19.46 36,716 1280 21.43 93% 7% 2% 8% Lisp SBCL 7.09 17,724 1757 7.18 1% 1% 88% 12% mandelbrot source secs mem gz busy cpu load Racket 19.92 128,228 801 75.95 95% 96% 95% 96% Lisp SBCL 6.66 46,768 2447 26.53 99% 99% 100% 99% k-nucleotide source secs mem gz busy cpu load Racket 100.10 417,588 885 105.50 3% 1% 4% 97% Lisp SBCL 16.10 538,172 2479 57.76 98% 88% 86% 86% fannkuch-redux source secs mem gz busy cpu load Racket 83.41 35,220 1101 326.64 100% 99% 94% 99% Lisp SBCL 12.06 33,044 1527 47.21 95% 99% 98% 99% regex-redux source secs mem gz busy cpu load Racket 26.20 1,242,924 729 57.35 65% 51% 17% 86% Lisp SBCL Failed Racket Welcome to Racket v7.7. Lisp SBCL SBCL 2.0.4 all Racket programs & measurements all Lisp SBCL programs & measurements