Swift programs versus Rust by benchmark task performance fasta source secs mem gz cpu cpu load Swift 2.37 31,132 2096 7.85 83% 85% 71% 94% Rust 3.84 2,904 1233 3.84 0% 0% 1% 100% binary-trees source secs mem gz cpu cpu load Swift 5.05 192,172 1001 14.17 60% 60% 63% 100% Rust 6.36 119,720 751 21.40 94% 77% 78% 90% fannkuch-redux source secs mem gz cpu cpu load Swift 10.11 7,996 1102 40.21 99% 100% 100% 100% Rust 12.07 1,832 1191 47.32 99% 100% 95% 99% pidigits source secs mem gz cpu cpu load Swift 1.75 8,948 601 1.75 1% 1% 1% 100% Rust 1.74 4,592 1366 1.74 1% 1% 3% 100% reverse-complement source secs mem gz cpu cpu load Swift 4.11 772,076 1287 4.80 10% 8% 19% 82% Rust 3.29 1,044,220 1871 4.33 33% 20% 77% 26% spectral-norm source secs mem gz cpu cpu load Swift 3.96 9,476 601 15.77 100% 100% 100% 100% Rust 2.51 2,752 1053 9.20 91% 93% 95% 90% n-body source secs mem gz cpu cpu load Swift 21.93 15,648 1357 21.92 100% 1% 0% 0% Rust 13.24 1,704 1480 13.23 1% 1% 1% 100% mandelbrot source secs mem gz cpu cpu load Swift 3.29 39,664 1136 13.05 100% 99% 99% 99% Rust 1.89 13,712 1007 7.51 100% 99% 100% 99% k-nucleotide source secs mem gz cpu cpu load Swift 21.89 233,016 1366 81.36 96% 91% 95% 91% Rust 5.53 140,784 1671 16.44 83% 51% 67% 99% regex-redux source secs mem gz cpu cpu load Swift 75.54 897,668 715 141.08 74% 29% 67% 21% Rust 3.02 189,036 804 4.40 87% 15% 17% 29% Swift Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu Rust rustc 1.25.0 (84203cac6 2018-03-25) vs C vs C++ vs Java vs Rust