[tstrimple]

> However Python and Ruby will hit scaling issues due to their performance limitations.

This is entirely determined by the problem domain it's being used for. The vast majority of web applications could use Django just fine without ever hitting a performance bottleneck outside the odd viral hug of death. You should prove you will have performance problems before you try to design solutions for it.

[skrtskrt]

True, I just noted that because if you're starting from true zero with no obvious preference for a particular language/framework, you have the opportunity to pick something that can reach a higher top end of performance before it requires fiddling.