Fastest cpu secs Erlang 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 Java #3 35,324 1257 41.17 Java 35,824 1282 41.74 Java #2 34,244 514 44.98 Erlang 37,384 1038 292.37 n-body source mem gz cpu Java #5 34,252 1429 6.79 Java #4 34,076 1489 6.79 Java #3 34,612 1430 7.50 Java #2 34,704 1424 7.50 Java 37,380 1430 7.83 Erlang #3 38,252 1399 102.87 spectral-norm source mem gz cpu Java #3 38,428 756 5.94 Java 37,288 514 9.76 Java #2 37,368 950 10.07 Erlang #2 47,752 747 44.63 Erlang 46,904 507 62.53 mandelbrot source mem gz cpu 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 Erlang #3 67,920 792 177.95 Erlang #4 62,252 806 179.92 Erlang #2 754,720 613 183.47 Erlang 1,649,612 534 189.73 pidigits source mem gz cpu Java #3 35,700 764 0.82 Java #2 38,328 938 1.53 Erlang 71,196 559 8.59 Java 513,728 800 8.94 Erlang #3 51,196 562 9.76 Erlang #2 55,512 512 10.81 regex-redux source mem gz cpu Java 924,116 868 17.12 Java #6 728,332 740 17.16 Java #3 741,028 929 17.34 Erlang #6 3,651,976 1048 56.86 fasta source mem gz cpu Java #4 36,800 1524 3.41 Java #6 42,416 2543 3.52 Java #5 42,532 2473 4.14 Java #2 36,812 1257 4.46 Erlang #2 38,076 1164 22.40 Erlang 38,116 1039 79.11 k-nucleotide source mem gz cpu Java 349,544 1812 16.17 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 Erlang #3 899,692 937 203.56 Erlang 5,771,892 936 209.96 reverse-complement source mem gz cpu Java #8 665,804 2183 3.49 Java #6 2,024,016 752 4.15 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 Erlang 3,129,524 1302 67.57 Erlang #4 2,005,888 1171 132.35 Erlang #3 6,163,520 630 158.88 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 Erlang 447,052 420 12.14 Erlang #2 448,724 478 15.97 Erlang Erlang/OTP 24 [erts-12.3.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [jit] 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 Erlang programs & measurements all Java programs & measurements