[bufo]

Depending on what you want to do, Io can be really fast. It has SIMD support built in so for some structures it can be faster than unoptimized C.

[kunley]

That's what I didn't know, relying on my previous encounters and specific tests. Thank you for pointing this!

[draegtun]

And here is a blog post which shows that a 200 times increase in speed is possible when using SIMD: http://www.iolanguage.com/blog/blog.cgi?do=item&id=92