The Computer Language
Benchmarks Game

Lua 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.

n-body
source secs mem gz busy cpu load
Lua 406.77 1,368 1305 412.06 0% 0% 1% 100%
Java 21.94 35,588 1429 22.39 100% 0% 1% 1%
k-nucleotide
source secs mem gz busy cpu load
Lua 189.90 521,716 613 191.07 1% 0% 99% 1%
Java 8.70 446,004 1812 27.18 83% 78% 78% 73%
fasta
source secs mem gz busy cpu load
Lua 51.34 3,056 1061 51.87 0% 0% 1% 100%
Java 2.23 45,156 2473 5.99 51% 62% 59% 97%
reverse-complement
source secs mem gz busy cpu load
Lua 77.65 2,932,848 553 77.85 26% 1% 4% 69%
Java 3.27 740,524 2183 7.44 44% 57% 84% 43%
mandelbrot
source secs mem gz busy cpu load
Lua 256.77 22,712 623 899.10 99% 86% 87% 78%
Java 5.98 79,184 796 23.43 98% 98% 97% 99%
spectral-norm
source secs mem gz busy cpu load
Lua 192.80 2,872 329 199.44 15% 85% 1% 2%
Java 4.19 36,740 950 16.36 98% 97% 98% 98%
binary-trees
source secs mem gz busy cpu load
Lua 468.44 2,358,616 412 477.98 1% 1% 100% 0%
Java 8.28 907,060 835 27.59 86% 90% 80% 77%
fannkuch-redux
source secs mem gz busy cpu load
Lua 1,317.39 1,340 462 1,339.50 0% 100% 1% 1%
Java 17.04 34,236 1282 67.30 99% 98% 100% 98%
regex-redux
source secs mem gz busy cpu load
Lua   Bad Output
Java 10.48 645,680 740 31.62 72% 87% 74% 68%
pidigits
source secs mem gz busy cpu load
Lua   Failed
Java 3.07 39,680 938 3.30 99% 3% 0% 5%
Lua

Lua 5.3.5 Copyright (C) 1994-2018 Lua.org, PUC-Rio

Java

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