Hi,

Looking at the 
code<https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/LazySeq.java>for
 LazySeq.seq() I was wondering why a 'while' loop is used rather than an 
'if' and a recursive call to ls.seq(), which would be cleaner code I guess? 
Am I right to suspect this simply an optimization to avoid possible stack 
overflow, or maybe for performance reasons, or is it some other reason?

final synchronized public ISeq seq(){
        sval();
        if(sv != null)
                {
                Object ls = sv;
                sv = null;
                while(ls instanceof LazySeq)
                        {
                        ls = ((LazySeq)ls).sval();
                        }
                s = RT.seq(ls);
                }
        return s;
}


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