Fastest cpu secs F# .NET 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 F# .NET #6 32,752 1097 33.86 F# .NET #5 37,736 912 41.06 Java #3 35,324 1257 41.17 Java 35,824 1282 41.74 Java #2 34,244 514 44.98 n-body source mem gz cpu F# .NET #6 37,180 1383 4.99 F# .NET #5 37,244 1351 6.31 Java #5 34,252 1429 6.79 Java #4 34,076 1489 6.79 F# .NET #3 35,620 1617 6.84 F# .NET #4 34,136 1290 6.91 F# .NET #2 37,376 1381 7.22 Java #3 34,612 1430 7.50 Java #2 34,704 1424 7.50 Java 37,380 1430 7.83 F# .NET Bad Output spectral-norm source mem gz cpu F# .NET #2 33,212 853 5.80 F# .NET #4 34,468 732 5.80 Java #3 38,428 756 5.94 Java 37,288 514 9.76 Java #2 37,368 950 10.07 mandelbrot source mem gz cpu F# .NET #6 66,476 933 14.65 F# .NET #5 66,724 897 15.54 F# .NET 66,700 877 15.67 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 pidigits source mem gz cpu F# .NET #6 34,380 905 0.80 Java #3 35,700 764 0.82 F# .NET #4 35,412 874 1.28 Java #2 38,328 938 1.53 Java 513,728 800 8.94 regex-redux source mem gz cpu F# .NET #7 1,219,132 599 5.82 F# .NET #6 1,061,172 611 7.26 Java 924,116 868 17.12 Java #6 728,332 740 17.16 Java #3 741,028 929 17.34 fasta source mem gz cpu Java #4 36,800 1524 3.41 Java #6 42,416 2543 3.52 F# .NET #3 79,888 1350 4.13 Java #5 42,532 2473 4.14 Java #2 36,812 1257 4.46 F# .NET #4 57,276 1342 5.84 k-nucleotide source mem gz cpu F# .NET #6 183,708 1907 12.55 Java 349,544 1812 16.17 F# .NET #2 198,604 1926 16.92 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 reverse-complement source mem gz cpu Java #8 665,804 2183 3.49 Java #6 2,024,016 752 4.15 F# .NET #5 1,030,932 1140 4.29 F# .NET #4 1,030,720 1139 4.43 Java #5 1,088,392 1108 4.92 Java #3 1,170,232 1722 5.09 Java #4 1,881,900 651 5.41 Java #7 1,030,892 1647 23.16 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 Java #7 2,460,388 835 7.73 F# .NET #7 1,398,648 516 15.62 F# .NET .NET SDK 6.0.101 Host Version: 6.0.1; Commit: 3a25a7f1cc <ServerGarbageCollection>true 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 F# .NET programs & measurements all Java programs & measurements