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 5.83 350,944 408 6.23 99% 3% 2% 2%
Java 10.25 634,884 740 30.23 68% 95% 67% 65%
fannkuch-redux
source secs mem gz busy cpu load
Julia 11.36 192,580 1067 42.32 95% 91% 93% 93%
Java 17.93 34,616 1282 70.89 98% 100% 98% 99%
mandelbrot
source secs mem gz busy cpu load
Julia 4.50 224,692 713 12.64 74% 74% 75% 58%
Java 6.90 78,956 796 27.14 99% 98% 98% 98%
pidigits
source secs mem gz busy cpu load
Julia 2.45 168,968 674 2.79 5% 98% 5% 5%
Java 3.07 39,184 938 3.29 99% 3% 4% 1%
n-body
source secs mem gz busy cpu load
Julia 22.34 180,516 1541 23.22 2% 1% 2% 99%
Java 21.91 35,356 1429 22.28 100% 0% 0% 1%
spectral-norm
source secs mem gz busy cpu load
Julia 4.81 174,632 370 17.16 86% 86% 88% 97%
Java 4.20 36,636 950 16.37 97% 98% 97% 97%
reverse-complement
source secs mem gz busy cpu load
Julia 4.85 714,064 724 5.36 2% 5% 4% 99%
Java 3.26 738,800 2183 7.49 44% 63% 73% 48%
k-nucleotide
source secs mem gz busy cpu load
Julia 14.36 334,520 1437 40.97 25% 100% 82% 79%
Java 9.06 435,240 1812 28.35 98% 73% 72% 69%
fasta
source secs mem gz busy cpu load
Julia 4.93 215,044 1049 5.36 3% 3% 99% 3%
Java 2.24 44,876 2473 6.13 18% 79% 79% 97%
binary-trees
source secs mem gz busy cpu load
Julia 23.88 634,308 372 78.75 92% 79% 80% 79%
Java 8.29 966,764 835 27.76 86% 80% 86% 83%
Julia

julia version 1.2.0
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)