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 21.91 35,356 1429 22.28 100% 0% 0% 1%
k-nucleotide
source secs mem gz busy cpu load
Lua 189.90 521,716 613 191.07 1% 0% 99% 1%
Java 9.06 435,240 1812 28.35 98% 73% 72% 69%
fasta
source secs mem gz busy cpu load
Lua 51.34 3,056 1061 51.87 0% 0% 1% 100%
Java 2.24 44,876 2473 6.13 18% 79% 79% 97%
reverse-complement
source secs mem gz busy cpu load
Lua 77.65 2,932,848 553 77.85 26% 1% 4% 69%
Java 3.26 738,800 2183 7.49 44% 63% 73% 48%
mandelbrot
source secs mem gz busy cpu load
Lua 256.77 22,712 623 899.10 99% 86% 87% 78%
Java 6.90 78,956 796 27.14 99% 98% 98% 98%
spectral-norm
source secs mem gz busy cpu load
Lua 192.80 2,872 329 199.44 15% 85% 1% 2%
Java 4.20 36,636 950 16.37 97% 98% 97% 97%
binary-trees
source secs mem gz busy cpu load
Lua 468.44 2,358,616 412 477.98 1% 1% 100% 0%
Java 8.29 966,764 835 27.76 86% 80% 86% 83%
fannkuch-redux
source secs mem gz busy cpu load
Lua 1,317.39 1,340 462 1,339.50 0% 100% 1% 1%
Java 17.93 34,616 1282 70.89 98% 100% 98% 99%
regex-redux
source secs mem gz busy cpu load
Lua   Bad Output
Java 10.25 634,884 740 30.23 68% 95% 67% 65%
pidigits
source secs mem gz busy cpu load
Lua   Failed
Java 3.07 39,184 938 3.29 99% 3% 4% 1%
Lua

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

Java

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