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. binary-trees source secs mem gz busy cpu load Rust 1.20 200,160 721 4.27 87% 86% 86% 98% C gcc 1.97 134,432 836 5.58 59% 66% 59% 100% mandelbrot source secs mem gz busy cpu load Rust 0.92 26,112 757 3.67 100% 100% 100% 100% C gcc 1.26 24,836 1135 5.00 99% 100% 100% 99% k-nucleotide source secs mem gz busy cpu load Rust 2.64 131,408 1578 8.41 66% 86% 92% 75% C gcc 3.43 130,252 1506 11.17 90% 92% 88% 56% n-body source secs mem gz busy cpu load Rust 3.42 1,844 1753 3.44 100% 0% 0% 0% C gcc 4.25 8 1391 4.37 100% 0% 2% 0% reverse-complement source secs mem gz busy cpu load Rust 0.74 994,912 1330 1.34 27% 81% 46% 27% C gcc 0.86 624,308 820 1.23 27% 18% 99% 0% spectral-norm source secs mem gz busy cpu load Rust 0.72 2,448 817 2.84 100% 99% 100% 99% C gcc 0.72 1,020 569 2.87 100% 100% 100% 99% fannkuch-redux source secs mem gz busy cpu load Rust 7.54 1,012 1016 29.62 95% 98% 100% 100% C gcc 7.45 692 910 29.11 93% 100% 100% 98% pidigits source secs mem gz busy cpu load Rust 0.88 2,904 1420 0.90 0% 100% 2% 0% C gcc 0.81 2,664 416 0.84 1% 0% 100% 2% fasta source secs mem gz busy cpu load Rust 0.94 2,180 1961 3.12 81% 81% 81% 89% C gcc 0.82 2,888 2268 3.27 100% 99% 100% 100% regex-redux source secs mem gz busy cpu load Rust 1.30 153,228 986 1.82 12% 85% 28% 15% C gcc 0.80 148,844 1397 2.03 53% 100% 54% 48% Rust rustc 1.46.0 (04488afe3 2020-08-24) LLVM version: 9.0 C gcc gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Rust programs & measurements all C gcc programs & measurements