Chapel versus Python 3 fastest programs Always look at the source code. These are only the fastest programs. Do some of them use manually vectorized SIMD? Look at the other programs. They may seem more-like a fair comparison to you. n-body source secs mem gz busy cpu load Chapel 6.79 5,388 971 7.09 100% 1% 0% 3% Python 3 586.17 8,012 1196 589.84 0% 0% 0% 100% spectral-norm source secs mem gz busy cpu load Chapel 1.46 5,204 310 5.80 99% 99% 99% 99% Python 3 118.40 22,912 407 470.86 99% 99% 99% 100% mandelbrot source secs mem gz busy cpu load Chapel 3.32 36,104 588 13.13 99% 98% 99% 99% Python 3 172.58 12,216 688 689.62 100% 100% 100% 100% fasta source secs mem gz busy cpu load Chapel 0.93 5,252 1391 3.36 100% 87% 88% 87% Python 3 39.10 846,628 1947 70.52 43% 8% 61% 69% fannkuch-redux source secs mem gz busy cpu load Chapel 9.35 4,288 731 37.30 100% 100% 100% 100% Python 3 367.49 12,288 950 1,454.68 100% 98% 99% 98% binary-trees source secs mem gz busy cpu load Chapel 7.86 298,696 488 24.18 100% 57% 77% 74% Python 3 49.35 278,628 589 174.26 95% 86% 86% 86% k-nucleotide source secs mem gz busy cpu load Chapel 10.43 177,052 996 38.90 100% 90% 91% 92% Python 3 46.37 239,472 1967 176.69 94% 95% 98% 94% reverse-complement source secs mem gz busy cpu load Chapel 1.65 1,882,564 755 3.51 96% 38% 38% 41% Python 3 7.16 1,005,968 814 10.65 20% 53% 47% 29% pidigits source secs mem gz busy cpu load Chapel 0.75 6,516 512 0.75 99% 1% 0% 0% Python 3 1.28 12,336 567 1.30 1% 0% 1% 100% regex-redux source secs mem gz busy cpu load Chapel 4.29 486,708 493 6.81 99% 21% 21% 17% Python 3 1.36 112,052 1403 2.64 40% 88% 32% 33% Chapel chpl version 1.23.0 Copyright 2020 Hewlett Packard Enterprise Development LP Copyright (c) 2004-2019, Cray Inc. Python 3 Python 3.9.0 all Chapel programs & measurements all Python 3 programs & measurements