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. reverse-complement source secs mem gz busy cpu load Rust 0.46 499,024 3040 0.83 26% 80% 47% 28% C gcc 0.86 698,264 820 1.27 1% 18% 100% 28% binary-trees source secs mem gz busy cpu load Rust 1.07 198,540 765 3.76 84% 100% 84% 83% C gcc 1.79 168,760 809 5.35 64% 64% 71% 100% k-nucleotide source secs mem gz busy cpu load Rust 2.76 159,224 1691 10.20 90% 98% 91% 90% C gcc 3.81 130,112 1506 12.18 54% 87% 79% 100% mandelbrot source secs mem gz busy cpu load Rust 0.93 32,788 763 3.69 100% 100% 99% 100% C gcc 1.27 31,692 1135 5.08 100% 100% 100% 99% n-body source secs mem gz busy cpu load Rust 3.31 836 1767 3.36 100% 1% 0% 1% C gcc 4.30 8 1391 4.32 0% 0% 0% 100% fasta source secs mem gz busy cpu load Rust 0.77 1,848 2529 1.57 99% 1% 4% 100% C gcc 0.82 2,896 2268 3.26 99% 100% 100% 99% fannkuch-redux source secs mem gz busy cpu load Rust 7.28 1,168 1016 28.82 100% 97% 100% 100% C gcc 7.52 836 910 29.37 99% 100% 93% 99% regex-redux source secs mem gz busy cpu load Rust 0.78 146,236 2458 1.99 53% 53% 61% 90% C gcc 0.80 152,196 1397 2.03 48% 100% 54% 53% spectral-norm source secs mem gz busy cpu load Rust 0.71 2,696 1055 2.86 100% 100% 100% 100% C gcc 0.72 1,100 569 2.86 100% 99% 100% 100% pidigits source secs mem gz busy cpu load Rust 0.74 2,888 1420 0.76 0% 0% 100% 3% C gcc 0.73 2,848 416 0.75 1% 100% 1% 0% Rust rustc 1.48.0 (7eac88abb 2020-11-16) LLVM version: 11.0 C gcc gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0 all Rust programs & measurements all C gcc programs & measurements