Rust versus C++ g++ 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 Rust 5.98 688 1753 6.02 0% 1% 100% 0% C++ g++ 7.70 1,612 1879 7.81 100% 0% 1% 1% binary-trees source secs mem gz busy cpu load Rust 3.48 199,856 721 12.62 88% 100% 87% 88% C++ g++ 3.96 113,236 809 12.86 74% 84% 98% 69% reverse-complement source secs mem gz busy cpu load Rust 1.69 994,988 1330 2.95 26% 45% 79% 24% C++ g++ 1.89 499,672 2093 1.94 100% 2% 1% 1% fannkuch-redux source secs mem gz busy cpu load Rust 10.06 1,020 1016 39.36 93% 100% 100% 99% C++ g++ 10.71 1,708 980 42.33 100% 96% 100% 100% pidigits source secs mem gz busy cpu load Rust 1.75 3,012 1366 1.78 1% 100% 1% 0% C++ g++ 1.82 4,312 513 1.87 1% 1% 2% 100% spectral-norm source secs mem gz busy cpu load Rust 1.97 2,440 1126 7.86 100% 99% 99% 99% C++ g++ 1.99 2,408 1044 7.89 99% 99% 99% 99% fasta source secs mem gz busy cpu load Rust 1.51 2,180 1906 4.66 76% 76% 83% 74% C++ g++ 1.46 2,024 2711 4.40 75% 76% 75% 76% mandelbrot source secs mem gz busy cpu load Rust 1.70 32,656 1332 6.70 98% 98% 99% 98% C++ g++ 1.51 26,256 1791 6.01 100% 99% 99% 99% regex-redux source secs mem gz busy cpu load Rust 2.20 153,504 986 3.23 15% 32% 84% 16% C++ g++ 1.86 203,856 1315 4.49 99% 50% 48% 44% k-nucleotide source secs mem gz busy cpu load Rust 5.21 135,388 1841 15.94 82% 54% 100% 70% C++ g++ 3.88 156,164 1631 12.09 72% 92% 71% 77% Rust rustc 1.44.0 (49cae5576 2020-06-01) LLVM version: 9.0 C++ g++ g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Rust programs & measurements all C++ g++ programs & measurements