Io's speed has improved a lot historically, but due to its dynamic nature, it has a relatively high dispatch overhead, and little of what remains can be optimiz

Io's speed has improved a lot historically, but due to its dynamic nature, it has a relatively high dispatch overhead, and little of what remains can be optimized away. In the past, GC was a big bottleneck, not sure where we are today on that front. Io is no speed deamon, but for heavy computation, its easy to dip into compiled C or C++ libs, putting it in the same ballpark as an unjitted ruby, python, or lua.