>>26
You still don't understand that Lisp isn't as slow as you think it is. Even if on average(if you didn't optimize anything), it could be some 3-4 times as slow, it would make no difference. Are all your applications that performance hungry?
Also, Lisp code is very easy to refactor and improve, so you can just improve your algorithm if you reach a bottleneck somewhere. Equivalent C code can take a lot more time to write
on average, which makes it less desirable for prototyping code.
This is a discussion which has been repeated hundreds of times around the internet, so I'll just say one thing: Linear vs logarithmic speed gains.
Do you know why I upgraded my computer last time? It was for a high-performance application that was written in asm with a bit of C. The upgrade gave a clear linear increase in performance and was what I needed. Using Asm or C doesn't mean you don't have to upgrade.
And for things that need really high-performance? Just make your application parallelizable and run it on multiple cores, and increase the core count until enough.