[hugi]

Well, my two primary tools are Xcode and Eclipse. Xcode is native but Eclipse is much, much faster. I doubt appliction performance has much to do with the language they're written in.

[FpUser]

Not the language but what it compiles to and of course some sorcery that few people possess.

Anyways I had actually used Eclipse and did not find it particularly responsive. Been a while so maybe it is faster now.