[lassekliemann]

Thank you for this book!

Lisp is great. It's so much fun writing Lisp. Coding Lisp with Emacs/Slime is almost an enlightening experience.

However, I never quite got over the frustration that writing the same thing in C++ gives factor two, three or whatever speedup. There is not much that can be done about this, I'm afraid. It's a tragedy.

[vseloved]

It depends on what you code and how. I hope the book explains some of the approaches and describes the tools that can be used to reduce that difference and avoid a tragedy :)

[TurboHaskal]

I would also recommend Edi Weitz's book "Common Lisp Recipes" for that. He offers great insights on how to improve performance.