The Computer Language
Benchmarks Game

Julia versus Java fastest programs

Back in April 2010, Russ Cox charitably suggested that only fannkuch-redux, fasta, k-nucleotide, mandlebrot, nbody, reverse-complement and spectral-norm were close to fair comparisons. As someone who implemented programming languages, his interest was "measuring the quality of the generated code when both compilers are presented with what amounts to the same program."

Differences in approach - to memory management, parallel programming, regex, arbitrary precision arithmetic, implementation technique - don't fit in that kind-of fair comparison — but we still have to deal with them.

These are only the fastest programs. There may be additional measurements for programs which seem more-like a fair comparison to you. Always look at the source code.

regex-redux
source secs mem gz busy cpu load
Julia 5.82 349,720 408 6.29 3% 3% 3% 99%
Java 10.48 645,680 740 31.62 72% 87% 74% 68%
fannkuch-redux
source secs mem gz busy cpu load
Julia 11.34 178,916 1067 43.47 95% 95% 95% 100%
Java 17.04 34,236 1282 67.30 99% 98% 100% 98%
mandelbrot
source secs mem gz busy cpu load
Julia 4.33 197,672 713 13.70 62% 99% 77% 78%
Java 5.98 79,184 796 23.43 98% 98% 97% 99%
pidigits
source secs mem gz busy cpu load
Julia 2.41 163,924 674 2.82 99% 7% 5% 5%
Java 3.07 39,680 938 3.30 99% 3% 0% 5%
n-body
source secs mem gz busy cpu load
Julia 22.29 175,412 1541 23.56 3% 2% 1% 100%
Java 21.94 35,588 1429 22.39 100% 0% 1% 1%
spectral-norm
source secs mem gz busy cpu load
Julia 4.71 160,908 370 17.43 90% 99% 91% 90%
Java 4.19 36,740 950 16.36 98% 97% 98% 98%
reverse-complement
source secs mem gz busy cpu load
Julia 5.50 697,412 667 5.99 8% 5% 3% 94%
Java 3.27 740,524 2183 7.44 44% 57% 84% 43%
fasta
source secs mem gz busy cpu load
Julia 4.85 205,456 1049 5.35 4% 5% 2% 99%
Java 2.23 45,156 2473 5.99 51% 62% 59% 97%
k-nucleotide
source secs mem gz busy cpu load
Julia 20.59 328,220 1373 52.21 62% 34% 99% 59%
Java 8.70 446,004 1812 27.18 83% 78% 78% 73%
binary-trees
source secs mem gz busy cpu load
Julia 24.25 645,876 372 77.77 93% 76% 74% 77%
Java 8.28 907,060 835 27.59 86% 90% 80% 77%
Julia

julia version 1.1.0
export JULIA_NUM_THREADS=4

Java

openjdk 12 2019-03-19
OpenJDK Runtime Environment (build 12+33)
OpenJDK 64-Bit Server VM (build 12+33, mixed mode, sharing)