Swift programs versus C gcc 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 gcc 1.74 2,716 452 1.74 100% 1% 1% 2% fannkuch-redux source secs mem gz cpu cpu load Swift 10.11 7,996 1102 40.21 99% 100% 100% 100% C gcc 8.66 980 910 34.22 100% 97% 100% 100% fasta source secs mem gz cpu cpu load Swift 2.37 31,132 2096 7.85 83% 85% 71% 94% C gcc 1.32 2,912 2268 5.25 100% 99% 100% 99% spectral-norm source secs mem gz cpu cpu load Swift 3.96 9,476 601 15.77 100% 100% 100% 100% C gcc 2.00 1,300 569 7.89 99% 99% 100% 99% mandelbrot source secs mem gz cpu cpu load Swift 3.29 39,664 1136 13.05 100% 99% 99% 99% C gcc 1.64 29,424 1135 6.53 99% 100% 100% 100% binary-trees source secs mem gz cpu cpu load Swift 5.05 192,172 1001 14.17 60% 60% 63% 100% C gcc 2.44 133,956 836 7.57 80% 65% 68% 100% reverse-complement source secs mem gz cpu cpu load Swift 4.11 772,076 1287 4.80 10% 8% 19% 82% C gcc 1.78 994,444 1438 3.96 42% 49% 96% 42% n-body source secs mem gz cpu cpu load Swift 21.93 15,648 1357 21.92 100% 1% 0% 0% C gcc 9.12 1,176 1490 9.12 1% 100% 2% 2% k-nucleotide source secs mem gz cpu cpu load Swift 21.89 233,016 1366 81.36 96% 91% 95% 91% C gcc 6.67 130,160 1506 19.33 76% 50% 92% 75% regex-redux source secs mem gz cpu cpu load Swift 75.54 897,668 715 141.08 74% 29% 67% 21% C gcc 1.48 152,352 1230 4.05 59% 99% 57% 61% Swift Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu C gcc gcc (Ubuntu 7.2.0-8ubuntu3) 7.2.0 vs C vs C++ vs Java vs Rust