Maybe this is intressting for you:
http://stackoverflow.com/questions/4304468/clojure-jvm-7-8-improvements/4306950#4306950

It should answer your question and give some more information.

On Jan 26, 4:04 pm, Harrison Maseko <lis...@gmail.com> wrote:
> Hi all,
> I need some help in understanding some basic concept. The book
> Programming Clojure on pages 134 - 136 deals with tail recursion and
> self-recursion using recur. The tail recursive example blows the stack
> while the self-recursive function using recur presented on page 135
> does not. On page 136 the book says that "the critical difference
> between tail-fibo (tail recursion) and recur-fibo (self-recursion
> using recur) is on line 7, where recur replaces the call to fib." Why
> does recur make such a difference in the way the function consumes
> resources? What really is the difference between a tail-recursive
> function and a recursive function using recur?
> Thanks for your help.
> -h.

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