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 3.58 476,684 622 6.31 68% 4% 99% 5% Java 10.31 644,560 740 31.47 72% 72% 92% 70% mandelbrot source secs mem gz busy cpu load Julia 3.24 260,364 579 11.81 89% 88% 99% 89% Java 6.83 79,108 796 26.86 97% 99% 99% 99% spectral-norm source secs mem gz busy cpu load Julia 2.67 168,520 521 8.98 79% 79% 79% 99% Java 4.22 36,948 950 16.43 98% 97% 98% 96% pidigits source secs mem gz busy cpu load Julia 2.19 166,356 674 2.55 6% 99% 6% 6% Java 3.07 39,320 938 3.31 2% 5% 3% 98% fannkuch-redux source secs mem gz busy cpu load Julia 11.12 188,240 1067 41.08 87% 91% 99% 93% Java 14.33 34,888 1282 56.56 99% 98% 99% 98% reverse-complement source secs mem gz busy cpu load Julia 2.99 663,100 522 3.40 5% 5% 6% 98% Java 3.16 712,368 2183 7.08 65% 47% 42% 70% n-body source secs mem gz busy cpu load Julia 22.53 179,180 1541 23.14 100% 1% 1% 1% Java 21.93 35,408 1429 22.44 1% 0% 100% 1% k-nucleotide source secs mem gz busy cpu load Julia 12.93 351,180 1365 32.90 48% 61% 68% 77% Java 9.33 447,976 1812 29.36 73% 83% 82% 77% fasta source secs mem gz busy cpu load Julia 3.16 373,700 1203 9.06 63% 63% 87% 73% Java 2.22 45,172 2473 5.99 61% 50% 98% 60% binary-trees source secs mem gz busy cpu load Julia 21.19 645,680 372 66.24 74% 74% 77% 88% Java 8.32 953,620 835 28.37 95% 87% 81% 77% Julia julia version 1.3.0 export JULIA_NUM_THREADS=4 Java openjdk 13 2019-09-17 OpenJDK Runtime Environment (build 13+33) OpenJDK 64-Bit Server VM (build 13+33, mixed mode, sharing) all Julia programs & measurements all Java programs & measurements