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 5.91 469,380 408 6.32 3% 2% 99% 3%
Java 10.31 644,560 740 31.47 72% 72% 92% 70%
mandelbrot
source secs mem gz busy cpu load
Julia 4.36 233,396 713 10.72 77% 77% 36% 57%
Java 6.83 79,108 796 26.86 97% 99% 99% 99%
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%
n-body
source secs mem gz busy cpu load
Julia 22.53 179,180 1541 23.14 100% 1% 1% 1%
Java 21.95 35,604 1429 22.75 2% 1% 100% 1%
spectral-norm
source secs mem gz busy cpu load
Julia 4.74 171,668 370 17.14 88% 99% 87% 88%
Java 4.19 36,680 950 16.31 98% 97% 97% 98%
reverse-complement
source secs mem gz busy cpu load
Julia 4.54 701,556 724 4.93 85% 3% 4% 17%
Java 3.16 712,368 2183 7.08 65% 47% 42% 70%
k-nucleotide
source secs mem gz busy cpu load
Julia 14.89 345,828 1437 29.83 41% 100% 22% 38%
Java 9.33 447,976 1812 29.36 73% 83% 82% 77%
fasta
source secs mem gz busy cpu load
Julia 5.01 189,584 1049 5.82 2% 12% 99% 3%
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)