Haskell GHC 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. regex-redux source secs mem gz busy cpu load Haskell GHC 1.68 308,212 2213 3.92 46% 77% 44% 66% Java 10.27 635,500 740 29.42 74% 81% 55% 76% fasta source secs mem gz busy cpu load Haskell GHC 1.40 8,020 1882 4.16 74% 74% 74% 75% Java 2.22 43,096 2473 6.10 67% 83% 45% 80% mandelbrot source secs mem gz busy cpu load Haskell GHC 5.06 37,660 1975 20.09 98% 100% 100% 100% Java 6.84 76,008 796 26.90 99% 98% 98% 98% pidigits source secs mem gz busy cpu load Haskell GHC 1.76 6,516 1694 1.79 0% 1% 1% 99% Java 1.83 34,848 764 1.95 99% 1% 4% 2% spectral-norm source secs mem gz busy cpu load Haskell GHC 4.09 4,184 987 16.03 98% 99% 99% 97% Java 4.15 36,428 950 16.26 98% 100% 98% 97% n-body source secs mem gz busy cpu load Haskell GHC 21.87 4,388 1883 86.43 98% 100% 98% 99% Java 21.85 34,112 1489 22.16 1% 0% 0% 100% fannkuch-redux source secs mem gz busy cpu load Haskell GHC 18.64 4,392 842 73.68 97% 99% 99% 100% Java 16.12 33,168 1282 63.71 100% 98% 99% 98% binary-trees source secs mem gz busy cpu load Haskell GHC 13.41 450,148 592 49.72 93% 92% 96% 90% Java 8.28 948,040 835 28.20 80% 84% 87% 90% reverse-complement source secs mem gz busy cpu load Haskell GHC 6.59 501,560 1020 9.74 92% 15% 19% 22% Java 3.27 714,144 2183 7.54 47% 60% 66% 58% k-nucleotide source secs mem gz busy cpu load Haskell GHC 36.99 639,092 1486 130.13 89% 87% 88% 88% Java 9.14 403,576 1812 29.10 87% 72% 74% 86% Haskell GHC The Glorious Glasgow Haskell Compilation System, version 8.8.1 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 Haskell GHC programs & measurements all Java programs & measurements