The Computer Language
Benchmarks Game

Go 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.

pidigits
source secs mem gz busy cpu load
Go 2.03 8,684 603 2.08 1% 1% 0% 100%
Java 3.07 39,680 938 3.30 99% 3% 0% 5%
mandelbrot
source secs mem gz busy cpu load
Go 5.48 30,820 894 21.79 100% 99% 99% 99%
Java 5.98 79,184 796 23.43 98% 98% 97% 99%
fasta
source secs mem gz busy cpu load
Go 2.07 2,928 1358 5.84 83% 30% 83% 86%
Java 2.23 45,156 2473 5.99 51% 62% 59% 97%
spectral-norm
source secs mem gz busy cpu load
Go 3.94 2,136 548 15.71 99% 100% 100% 99%
Java 4.19 36,740 950 16.36 98% 97% 98% 98%
n-body
source secs mem gz busy cpu load
Go 21.06 1,432 1200 21.29 0% 0% 100% 1%
Java 21.94 35,588 1429 22.39 100% 0% 1% 1%
fannkuch-redux
source secs mem gz busy cpu load
Go 17.24 1,432 900 68.76 100% 100% 100% 100%
Java 17.04 34,236 1282 67.30 99% 98% 100% 98%
reverse-complement
source secs mem gz busy cpu load
Go 3.99 824,856 611 4.24 6% 1% 1% 98%
Java 3.27 740,524 2183 7.44 44% 57% 84% 43%
k-nucleotide
source secs mem gz busy cpu load
Go 12.08 157,488 1607 45.40 93% 93% 97% 92%
Java 8.70 446,004 1812 27.18 83% 78% 78% 73%
regex-redux
source secs mem gz busy cpu load
Go 29.20 399,668 802 61.29 71% 55% 37% 47%
Java 10.48 645,680 740 31.62 72% 87% 74% 68%
binary-trees
source secs mem gz busy cpu load
Go 25.25 374,780 1013 87.65 87% 88% 86% 86%
Java 8.28 907,060 835 27.59 86% 90% 80% 77%
Go

go version go1.12.4 linux/amd64

Java

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