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 2.05 8,444 603 2.10 29% 1% 35% 37%
Java 3.07 39,184 938 3.29 99% 3% 4% 1%
mandelbrot
source secs mem gz busy cpu load
Go 5.47 31,104 905 21.78 99% 100% 99% 99%
Java 6.90 78,956 796 27.14 99% 98% 98% 98%
fasta
source secs mem gz busy cpu load
Go 2.07 3,568 1358 5.67 80% 75% 40% 79%
Java 2.24 44,876 2473 6.13 18% 79% 79% 97%
spectral-norm
source secs mem gz busy cpu load
Go 3.95 2,500 548 15.72 100% 99% 100% 99%
Java 4.20 36,636 950 16.37 97% 98% 97% 97%
n-body
source secs mem gz busy cpu load
Go 21.25 1,588 1310 21.43 0% 100% 0% 0%
Java 21.91 35,356 1429 22.28 100% 0% 0% 1%
fannkuch-redux
source secs mem gz busy cpu load
Go 17.53 11,672 896 70.01 100% 100% 100% 100%
Java 17.93 34,616 1282 70.89 98% 100% 98% 99%
reverse-complement
source secs mem gz busy cpu load
Go 3.55 1,783,340 1338 6.26 45% 32% 41% 59%
Java 3.26 738,800 2183 7.49 44% 63% 73% 48%
k-nucleotide
source secs mem gz busy cpu load
Go 11.86 160,068 1607 44.82 93% 94% 97% 94%
Java 9.06 435,240 1812 28.35 98% 73% 72% 69%
regex-redux
source secs mem gz busy cpu load
Go 29.64 438,516 802 62.79 58% 57% 53% 44%
Java 10.25 634,884 740 30.23 68% 95% 67% 65%
binary-trees
source secs mem gz busy cpu load
Go 25.40 370,688 1005 87.09 86% 86% 86% 85%
Java 8.29 966,764 835 27.76 86% 80% 86% 83%
Go

go version go1.13 linux/amd64

Java

openjdk 13 2019-09-17
OpenJDK Runtime Environment (build 13+33)
OpenJDK 64-Bit Server VM (build 13+33, mixed mode, sharing)