Ada 2012 GNAT versus Rust 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. pidigits source secs mem gz busy cpu load Ada 2012 GNAT 1.75 4,600 1130 1.79 0% 2% 1% 100% Rust 1.75 3,012 1366 1.78 1% 100% 1% 0% spectral-norm source secs mem gz busy cpu load Ada 2012 GNAT 2.00 4,248 2770 7.88 99% 98% 99% 99% Rust 1.97 2,440 1126 7.86 100% 99% 99% 99% fannkuch-redux source secs mem gz busy cpu load Ada 2012 GNAT 10.23 4,332 2113 40.80 100% 100% 100% 100% Rust 10.06 1,020 1016 39.36 93% 100% 100% 99% n-body source secs mem gz busy cpu load Ada 2012 GNAT 9.71 1,784 2617 9.89 1% 0% 100% 1% Rust 5.98 688 1753 6.02 0% 1% 100% 0% k-nucleotide source secs mem gz busy cpu load Ada 2012 GNAT 10.22 258,500 4908 23.76 37% 19% 89% 87% Rust 5.21 135,388 1841 15.94 82% 54% 100% 70% reverse-complement source secs mem gz busy cpu load Ada 2012 GNAT 4.05 789,068 3283 4.64 40% 1% 72% 1% Rust 1.69 994,988 1330 2.95 26% 45% 79% 24% fasta source secs mem gz busy cpu load Ada 2012 GNAT 4.18 1,784 2153 4.25 95% 0% 0% 6% Rust 1.51 2,180 1906 4.66 76% 76% 83% 74% binary-trees source secs mem gz busy cpu load Ada 2012 GNAT 9.82 202,292 2107 33.89 84% 94% 82% 85% Rust 3.48 199,856 721 12.62 88% 100% 87% 88% regex-redux source secs mem gz busy cpu load Ada 2012 GNAT 7.02 154,252 3640 19.93 59% 61% 84% 79% Rust 2.20 153,504 986 3.23 15% 32% 84% 16% mandelbrot source secs mem gz busy cpu load Ada 2012 GNAT 5.60 35,640 1819 22.24 100% 99% 99% 99% Rust 1.70 32,656 1332 6.70 98% 98% 99% 98% Ada 2012 GNAT GNATMAKE 9.3.0 gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 Rust rustc 1.44.0 (49cae5576 2020-06-01) LLVM version: 9.0 all Ada 2012 GNAT programs & measurements all Rust programs & measurements