The Computer Language
Benchmarks Game

Rust versus Go 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
Rust 2.16 153,232 986 3.17 84% 16% 17% 29%
Go 29.20 399,668 802 61.29 71% 55% 37% 47%
binary-trees
source secs mem gz busy cpu load
Rust 3.26 152,504 756 11.97 99% 90% 89% 89%
Go 25.25 374,780 1013 87.65 87% 88% 86% 86%
n-body
source secs mem gz busy cpu load
Rust 5.71 872 1753 5.79 0% 1% 100% 0%
Go 21.06 1,432 1200 21.29 0% 0% 100% 1%
mandelbrot
source secs mem gz busy cpu load
Rust 1.98 32,092 719 7.83 98% 100% 98% 98%
Go 5.48 30,820 894 21.79 100% 99% 99% 99%
reverse-complement
source secs mem gz busy cpu load
Rust 1.63 994,780 1376 2.80 100% 24% 25% 23%
Go 3.99 824,856 611 4.24 6% 1% 1% 98%
k-nucleotide
source secs mem gz busy cpu load
Rust 5.33 134,280 1841 16.09 60% 91% 62% 89%
Go 12.08 157,488 1607 45.40 93% 93% 97% 92%
spectral-norm
source secs mem gz busy cpu load
Rust 1.97 2,312 1126 7.87 99% 100% 100% 99%
Go 3.94 2,136 548 15.71 99% 100% 100% 99%
fannkuch-redux
source secs mem gz busy cpu load
Rust 10.29 872 1020 40.17 92% 100% 99% 100%
Go 17.24 1,432 900 68.76 100% 100% 100% 100%
fasta
source secs mem gz busy cpu load
Rust 1.47 2,036 1906 4.60 77% 76% 83% 77%
Go 2.07 2,928 1358 5.84 83% 30% 83% 86%
pidigits
source secs mem gz busy cpu load
Rust 1.75 3,172 1366 1.80 2% 1% 0% 100%
Go 2.03 8,684 603 2.08 1% 1% 0% 100%
Rust

rustc 1.37.0 (eae3437df 2019-08-13)
LLVM version 8.0

Go

go version go1.12.4 linux/amd64