Fastest cpu secs Ruby versus Python 3 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 Ruby #2 288,852 1455 1,010.75 Python 3 #6 7,432 385 1,279.15 Python 3 #4 45,420 950 1,336.72 Ruby 285,268 384 1,748.13 n-body source mem gz cpu Ruby #3 285,504 1163 219.69 Ruby #2 285,552 1137 224.66 Python 3 7,756 1196 575.02 Python 3 #2 8,244 1242 592.71 spectral-norm source mem gz cpu Ruby #4 287,424 326 113.59 Ruby 286,944 292 142.22 Ruby #5 288,548 758 216.98 Python 3 #6 9,332 328 436.79 Python 3 #8 48,336 407 472.82 Python 3 #7 48,400 417 494.32 mandelbrot source mem gz cpu Ruby #5 324,320 970 655.37 Python 3 #7 46,192 688 706.10 Ruby #4 409,304 857 857.98 Ruby #2 361,904 880 1,069.66 Ruby #3 285,212 307 1,470.34 Python 3 #5 Failed Ruby #7 Failed Ruby #6 Failed Python 3 #2 Timed Out pidigits source mem gz cpu Python 3 #3 11,968 567 1.13 Ruby #5 846,476 485 1.69 Ruby #2 613,348 658 2.74 Python 3 #4 8,668 342 4.06 Ruby 451,736 518 17.65 Python 3 #2 Bad Output regex-redux source mem gz cpu Python 3 #2 111,680 1403 2.66 Python 3 458,264 512 17.86 Ruby #3 649,832 724 23.22 Ruby #2 684,764 437 23.23 Ruby #9 678,228 321 25.87 fasta source mem gz cpu Ruby #6 340,624 1069 27.24 Ruby #3 337,560 1002 50.87 Python 3 #2 8,184 1121 60.26 Python 3 #3 8,112 1003 60.50 Python 3 8,040 817 70.54 Python 3 #5 837,684 1947 71.74 Ruby #4 541,176 860 97.62 Ruby #5 286,228 995 98.69 Ruby #2 480,812 743 153.89 k-nucleotide source mem gz cpu Python 3 #3 252,668 1967 172.53 Python 3 351,092 607 240.16 Python 3 #8 473,988 655 242.16 Ruby #2 455,288 420 243.58 Ruby #7 657,660 785 271.49 Ruby 408,036 576 281.84 Ruby #3 461,428 540 282.00 reverse-complement source mem gz cpu Python 3 #2 1,786,488 434 9.38 Python 3 1,979,276 479 9.63 Python 3 #6 1,005,184 814 10.64 Ruby #5 1,874,980 295 11.49 Python 3 #4 4,001,684 335 12.31 Ruby #3 2,272,876 482 19.15 Ruby #2 774,468 264 19.40 Ruby #4 2,273,936 601 22.60 Ruby 2,273,352 514 32.89 binary-trees source mem gz cpu Ruby #4 667,224 364 68.23 Ruby 667,228 376 71.73 Ruby #3 896,992 400 72.06 Ruby #2 667,172 378 72.24 Ruby #5 671,376 1008 75.52 Python 3 #2 270,872 338 148.09 Python 3 #5 273,284 660 172.44 Python 3 #4 456,220 472 176.37 Python 3 282,996 589 178.66 Python 3 #3 669,832 1238 230.73 Ruby ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux] --yjit Python 3 Python 3.10.4 all Ruby programs & measurements all Python 3 programs & measurements