Some time ago, after the release of IronRuby, IBM employee Antonio Cangiano
conducted performance tests and obtained interesting results.

As we see from the graph, IronRuby confidently strides forward and gives good performance results. Despite the result of the IronRuby graphs, it is no faster than Ruby 1.9.1, which is not the case when comparing with the 1.8.x branch
No matter how fast it is, faster IronRuby or slower than Ruby 1.9, it provides a good alternative for programmers who develop and deploy their applications on Windows. Connecting the power of .NET and VS - IronRuby provides interesting features, including running Ruby code in the browser, thanks to projects such as Silverlight / Moonlight and
Gestalt .
At the moment, IronRuby is aimed at implementing the
functionality of Ruby 1.8.x.The official site of the project
IronRubyIronRuby 0.9 review from
XaocCPS