Ruby versus Python 3 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. n-body source secs mem gz busy cpu load Ruby 376.42 25,112 1137 401.06 92% 2% 4% 9% Python 3 891.12 8,416 1196 924.03 1% 53% 47% 2% binary-trees source secs mem gz busy cpu load Ruby 44.67 531,624 1096 126.74 79% 60% 73% 72% Python 3 80.82 448,104 589 288.23 91% 88% 91% 86% fannkuch-redux source secs mem gz busy cpu load Ruby 307.68 26,776 1444 1,190.76 98% 95% 96% 98% Python 3 494.58 47,432 950 1,956.79 98% 99% 98% 100% fasta source secs mem gz busy cpu load Ruby 51.46 122,960 1069 57.67 20% 22% 47% 23% Python 3 63.63 841,056 1947 127.80 58% 61% 44% 37% spectral-norm source secs mem gz busy cpu load Ruby 154.65 26,296 839 603.60 98% 98% 97% 97% Python 3 170.10 49,484 417 670.83 99% 98% 98% 99% mandelbrot source secs mem gz busy cpu load Ruby 340.43 65,964 931 1,353.94 100% 99% 99% 99% Python 3 263.87 48,268 688 1,054.07 100% 100% 100% 100% pidigits source secs mem gz busy cpu load Ruby 3.21 369,020 485 5.35 21% 31% 15% 100% Python 3 2.39 12,200 567 2.55 64% 37% 5% 1% k-nucleotide source secs mem gz busy cpu load Ruby 106.07 145,640 644 387.67 92% 93% 87% 93% Python 3 72.58 183,484 1967 276.33 95% 95% 94% 97% reverse-complement source secs mem gz busy cpu load Ruby 31.78 511,692 264 34.71 5% 54% 47% 4% Python 3 16.41 1,772,696 434 17.57 1% 78% 28% 0% regex-redux source secs mem gz busy cpu load Ruby 15.85 277,116 724 35.00 93% 39% 41% 48% Python 3 2.67 111,864 1403 4.86 87% 30% 29% 35% Ruby ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux] --jit Python 3 Python 3.8.0 all Ruby programs & measurements all Python 3 programs & measurements