Erlang versus Ruby fastest performance 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 seconds, less gz source code. fannkuch-redux source secs mem gz cpu secs Erlang 67.13 42,432 1044 264.91 Ruby #2 139.77 21,120 1462 536.11 Ruby 1,380.34 20,992 391 1,380.29 n-body source secs mem gz cpu secs Erlang #3 104.36 42,236 1405 104.40 Ruby #3 188.71 21,248 1169 188.71 Ruby #2 215.31 21,248 1143 215.31 spectral-norm source secs mem gz cpu secs Erlang #2 11.75 51,176 753 45.92 Erlang 62.78 53,460 513 62.88 Ruby 126.55 22,144 299 126.54 Ruby #4 129.16 22,912 333 129.16 Ruby #5 64.82 27,520 764 236.48 mandelbrot source secs mem gz cpu secs Erlang #3 52.26 72,520 798 208.31 Erlang #4 54.50 73,988 813 217.27 Ruby #5 151.07 86,272 978 603.13 Ruby #4 661.22 136,132 862 661.94 Ruby #2 259.17 94,336 887 1,034.44 Ruby #3 1,538.89 21,120 313 1,538.80 Ruby #6 Failed Erlang Bad Output Erlang #2 Bad Output Ruby #7 Failed pidigits source secs mem gz cpu secs Ruby #5 1.56 850,304 494 1.55 Ruby #2 3.22 2,271,624 666 3.22 Erlang #3 3.38 56,616 568 4.45 Erlang #2 3.27 61,680 518 5.16 Erlang 6.01 74,676 565 6.75 Ruby 16.56 104,192 524 16.55 regex-redux source secs mem gz cpu secs Ruby #2 23.19 216,576 444 23.19 Ruby #3 11.84 216,576 730 24.21 Ruby #9 30.10 216,576 327 30.09 Erlang #6 22.65 5,214,780 1055 42.40 fasta source secs mem gz cpu secs Erlang #2 18.95 41,932 1170 21.45 Ruby #6 23.07 120,064 1070 23.07 Ruby #3 35.52 120,064 1004 35.52 Ruby #5 91.70 22,784 1000 91.69 Ruby #2 93.97 147,548 747 93.97 Ruby #4 95.74 266,496 864 95.73 Erlang 86.89 40,612 1045 175.84 k-nucleotide source secs mem gz cpu secs Ruby #7 256.92 393,216 792 255.31 Ruby #2 255.78 181,700 426 255.60 Ruby #3 272.84 203,672 546 273.06 Ruby 84.88 172,436 583 300.65 Erlang #3 5,904.10 556,024 945 6,158.16 Erlang 5,894.88 4,485,776 944 6,183.90 reverse-complement source secs mem gz cpu secs Ruby #5 10.77 1,624,300 301 10.76 Ruby #4 6.88 2,510,956 608 12.51 Ruby #3 9.57 4,232,604 490 17.72 Ruby #2 24.46 1,001,852 272 24.46 Ruby 18.75 5,147,124 521 36.24 Erlang 1,799.36 1,801,408 1309 2,028.27 Erlang #4 Timed Out Erlang #3 Timed Out binary-trees source secs mem gz cpu secs Erlang 10.86 469,136 426 11.07 Erlang #2 5.02 465,116 485 14.02 Ruby #4 46.87 478,848 371 46.86 Ruby 48.73 478,976 383 48.72 Ruby #2 48.78 478,976 385 48.76 Ruby #3 50.16 515,924 407 50.14 Ruby #5 18.96 521,984 1016 53.93 Erlang Erlang/OTP 26 [erts-14.2.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [jit:ns] Ruby ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [x86_64-linux] all Erlang programs & measurements all Ruby programs & measurements