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 5.98 688 1753 6.02 0% 1% 100% 0% C gcc 7.30 8 1391 7.41 0% 1% 100% 0% reverse-complement source secs mem gz busy cpu load Rust 1.69 994,988 1330 2.95 26% 45% 79% 24% C gcc 1.92 551,900 820 2.58 20% 99% 14% 1% binary-trees source secs mem gz busy cpu load Rust 3.48 199,856 721 12.62 88% 100% 87% 88% C gcc 3.59 168,896 809 11.86 77% 74% 98% 82% spectral-norm source secs mem gz busy cpu load Rust 1.97 2,440 1126 7.86 100% 99% 99% 99% C gcc 1.98 988 569 7.89 99% 99% 100% 99% pidigits source secs mem gz busy cpu load Rust 1.75 3,012 1366 1.78 1% 100% 1% 0% C gcc 1.75 2,608 452 1.80 67% 0% 2% 33% fasta source secs mem gz busy cpu load Rust 1.51 2,180 1906 4.66 76% 76% 83% 74% C gcc 1.46 2,948 2268 5.84 100% 99% 100% 99% mandelbrot source secs mem gz busy cpu load Rust 1.70 32,656 1332 6.70 98% 98% 99% 98% C gcc 1.64 27,024 1135 6.53 99% 99% 100% 100% k-nucleotide source secs mem gz busy cpu load Rust 5.21 135,388 1841 15.94 82% 54% 100% 70% C gcc 4.84 130,192 1506 16.00 98% 83% 63% 87% fannkuch-redux source secs mem gz busy cpu load Rust 10.06 1,020 1016 39.36 93% 100% 100% 99% C gcc 8.73 696 910 34.46 100% 95% 100% 100% regex-redux source secs mem gz busy cpu load Rust 2.20 153,504 986 3.23 15% 32% 84% 16% C gcc 1.42 152,192 1397 3.40 100% 48% 48% 44% Rust rustc 1.44.0 (49cae5576 2020-06-01) LLVM version: 9.0 C gcc gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Rust programs & measurements all C gcc programs & measurements