Julia versus Java 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. regex-redux source secs mem gz busy cpu load Julia 1.75 384,588 759 3.10 6% 67% 93% 12% Java 5.70 656,328 929 18.25 89% 76% 79% 75% mandelbrot source secs mem gz busy cpu load Julia 1.38 235,276 621 4.78 83% 83% 83% 99% Java 4.11 68,204 796 16.20 98% 99% 98% 99% n-body source secs mem gz busy cpu load Julia 4.00 212,108 1112 4.30 99% 3% 3% 3% Java 6.75 35,200 1489 6.83 0% 0% 100% 1% fannkuch-redux source secs mem gz busy cpu load Julia 7.96 197,292 1067 30.06 94% 95% 94% 94% Java 11.00 34,104 1282 43.42 99% 98% 98% 99% spectral-norm source secs mem gz busy cpu load Julia 1.23 180,836 521 3.87 73% 71% 91% 80% Java 1.68 38,348 950 6.43 96% 96% 96% 95% k-nucleotide source secs mem gz busy cpu load Julia 4.66 360,436 945 10.68 39% 52% 53% 85% Java 5.00 408,040 1812 16.36 74% 81% 86% 86% reverse-complement source secs mem gz busy cpu load Julia 1.50 671,028 522 1.77 7% 9% 96% 7% Java 1.54 702,332 2183 3.55 78% 46% 49% 57% pidigits source secs mem gz busy cpu load Julia 1.00 168,088 506 1.31 11% 99% 11% 10% Java 0.79 35,568 764 0.84 99% 3% 3% 1% fasta source secs mem gz busy cpu load Julia 1.72 354,912 1182 4.90 79% 75% 63% 69% Java 1.20 44,124 2543 3.61 79% 86% 69% 65% binary-trees source secs mem gz busy cpu load Julia 9.67 604,312 372 29.97 75% 84% 72% 78% Java 2.50 2,487,096 835 7.90 88% 75% 75% 79% Julia julia version 1.5.0 Java openjdk 15 2020-09-15 OpenJDK Runtime Environment (build 15+36-1562) OpenJDK 64-Bit Server VM (build 15+36-1562, mixed mode, sharing) all Julia programs & measurements all Java programs & measurements