[ssafejava]

You could - but V8 is actually much faster than Ruby or Python, and JS syntax is quite good for I/O. Better than that, a ton of people know JS and the more developers find this accessible, the better.

[w1ntermute]

> V8 is actually much faster than Ruby or Python

Actually, they are compiling to Lua bytecode in this case.

> JS syntax is quite good for I/O

And you can pass around blocks in Ruby.

[aaronem]

And you can't in Javascript? Sure, the syntax is a little clunky, but the semantics are precisely the same.