Rerunning an old benchmark

In 2011, Robert Hundt published this paper testing the performance of several languages on a loop detection task typically found in compilers. The code is available here. Go had to tweaked a bit. I ran the benchmarks on EC2 m3.medium instance with Ubuntu 14.04 (ami-1d8c9574). For some benchmarks there’s a Pro version where someone hand optimized the code. Here are the results: 

Language Runtime(sec)
C++ 48
Java 93
Java Pro 40
Scala 74
Scala Pro 28
Go 92
Go Pro 63
Python 891
PyPy 138


The following lessons can be learned: PyPy is awesome. Java, Scala, and Go are in the same league. Finding an expert to optimize your hotspots might double performance.


  • g++ (Ubuntu 4.8.2-19ubuntu1) 4.8.2
  • java version “1.8.0_05”
  • go version go1.3 linux/amd64
  • Python 2.7.6
  • Python 2.7.6 (2.3.1+dfsg-1~ppa1, Jun 20 2014, 09:27:47) [PyPy 2.3.1 with GCC 4.6.3]
  • Scala code runner version 2.11.1 — Copyright 2002-2013, LAMP/EPFL