Swift programs versus C++ g++ by benchmark task performance pidigits source secs mem gz cpu cpu load Swift 1.75 8,948 601 1.75 1% 1% 1% 100% C++ g++ 1.88 4,276 513 1.88 0% 100% 1% 0% fannkuch-redux source secs mem gz cpu cpu load Swift 10.11 7,996 1102 40.21 99% 100% 100% 100% C++ g++ 10.61 2,044 980 41.90 100% 96% 100% 100% reverse-complement source secs mem gz cpu cpu load Swift 4.11 772,076 1287 4.80 10% 8% 19% 82% C++ g++ 3.08 980,604 2280 4.66 62% 25% 12% 54% fasta source secs mem gz cpu cpu load Swift 2.37 31,132 2096 7.85 83% 85% 71% 94% C++ g++ 1.35 1,952 2711 4.18 79% 78% 78% 79% spectral-norm source secs mem gz cpu cpu load Swift 3.96 9,476 601 15.77 100% 100% 100% 100% C++ g++ 2.02 1,332 1044 7.91 99% 99% 99% 99% binary-trees source secs mem gz cpu cpu load Swift 5.05 192,172 1001 14.17 60% 60% 63% 100% C++ g++ 2.55 135,568 809 7.99 85% 96% 69% 66% mandelbrot source secs mem gz cpu cpu load Swift 3.29 39,664 1136 13.05 100% 99% 99% 99% C++ g++ 1.51 25,704 1791 5.99 99% 100% 100% 100% n-body source secs mem gz cpu cpu load Swift 21.93 15,648 1357 21.92 100% 1% 0% 0% C++ g++ 8.23 1,856 1763 8.23 100% 1% 1% 0% k-nucleotide source secs mem gz cpu cpu load Swift 21.89 233,016 1366 81.36 96% 91% 95% 91% C++ g++ 7.75 165,180 1276 26.02 80% 96% 82% 79% regex-redux source secs mem gz cpu cpu load Swift 75.54 897,668 715 141.08 74% 29% 67% 21% C++ g++ 1.61 203,572 1315 4.18 100% 52% 57% 54% Swift Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu C++ g++ g++ (Ubuntu 7.2.0-8ubuntu3) 7.2.0 vs C vs C++ vs Java vs Rust