Swift programs versus Java by benchmark task performance mandelbrot source secs mem gz cpu cpu load Swift 3.29 39,664 1136 13.05 100% 99% 99% 99% Java 6.10 76,520 796 23.59 97% 98% 98% 96% fannkuch-redux source secs mem gz cpu cpu load Swift 10.11 7,996 1102 40.21 99% 100% 100% 100% Java 18.27 31,820 1282 72.06 99% 99% 98% 98% pidigits source secs mem gz cpu cpu load Swift 1.75 8,948 601 1.75 1% 1% 1% 100% Java 3.13 36,984 938 3.36 4% 4% 99% 3% binary-trees source secs mem gz cpu cpu load Swift 5.05 192,172 1001 14.17 60% 60% 63% 100% Java 8.39 933,808 835 28.28 82% 86% 84% 88% spectral-norm source secs mem gz cpu cpu load Swift 3.96 9,476 601 15.77 100% 100% 100% 100% Java 4.38 35,388 950 16.80 96% 96% 95% 97% n-body source secs mem gz cpu cpu load Swift 21.93 15,648 1357 21.92 100% 1% 0% 0% Java 22.17 33,040 1489 22.27 100% 1% 0% 1% fasta source secs mem gz cpu cpu load Swift 2.37 31,132 2096 7.85 83% 85% 71% 94% Java 2.27 43,628 2473 5.93 51% 75% 57% 81% reverse-complement source secs mem gz cpu cpu load Swift 4.11 772,076 1287 4.80 10% 8% 19% 82% Java 3.15 680,424 2183 7.07 52% 70% 43% 63% k-nucleotide source secs mem gz cpu cpu load Swift 21.89 233,016 1366 81.36 96% 91% 95% 91% Java 8.75 385,056 1812 27.09 85% 72% 70% 85% regex-redux source secs mem gz cpu cpu load Swift 75.54 897,668 715 141.08 74% 29% 67% 21% Java 10.51 573,972 929 31.30 70% 73% 70% 86% Swift Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu Java java 10 2018-03-20 Java(TM) SE Runtime Environment 18.3 (build 10+46) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode) vs C vs C++ vs Java vs Rust