Rust versus C gcc 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 6.07 940 1753 6.16 100% 1% 0% 0% C gcc 7.30 8 1391 7.33 0% 0% 1% 100% reverse-complement source secs mem gz busy cpu load Rust 1.69 994,564 1330 2.98 45% 26% 47% 59% C gcc 1.91 532,932 820 2.59 21% 16% 99% 0% binary-trees source secs mem gz busy cpu load Rust 3.31 199,852 721 12.01 88% 88% 87% 100% C gcc 3.53 168,764 809 11.64 74% 99% 72% 85% spectral-norm source secs mem gz busy cpu load Rust 1.98 2,244 1126 7.89 99% 100% 99% 99% C gcc 1.98 1,236 569 7.87 99% 99% 99% 99% pidigits source secs mem gz busy cpu load Rust 1.75 3,036 1366 1.77 100% 0% 1% 1% C gcc 1.75 2,804 452 1.77 0% 100% 0% 1% fasta source secs mem gz busy cpu load Rust 1.51 2,044 1906 4.60 74% 73% 82% 75% C gcc 1.46 2,976 2268 5.82 99% 100% 99% 99% mandelbrot source secs mem gz busy cpu load Rust 1.70 30,544 1332 6.69 98% 98% 99% 98% C gcc 1.64 27,016 1135 6.54 100% 99% 100% 100% k-nucleotide source secs mem gz busy cpu load Rust 5.38 135,192 1749 17.05 64% 73% 89% 91% C gcc 5.09 130,092 1506 16.69 100% 86% 60% 82% fannkuch-redux source secs mem gz busy cpu load Rust 11.08 944 1016 43.52 100% 94% 100% 99% C gcc 8.74 936 910 34.47 100% 95% 100% 100% regex-redux source secs mem gz busy cpu load Rust 2.12 153,104 986 3.14 17% 14% 33% 84% C gcc 1.47 152,156 1397 3.46 47% 100% 43% 45% Rust rustc 1.40.0 (73528e339 2019-12-16) LLVM version: 9.0 C gcc gcc (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008 all Rust programs & measurements all C gcc programs & measurements