diff --git a/memo.scm b/memo.scm
index bc40e25a..bea55409 100644
--- a/memo.scm
+++ b/memo.scm
@@ -26,30 +26,30 @@
 (write (mfnc 1 1)) (newline)
 
 ; Original versions:
-;(define (ack m n)
-;  (cond ((= m 0) (+ n 1))
-;        ((= n 0) (ack (- m 1) 1))
-;        (else (ack (- m 1) (ack m (- n 1))))))
-;(define (fib n)
-;  (if (< n 2)
-;      n
-;      (+ (fib (- n 1))
-;         (fib (- n 2)))))
-
-; Fast versions:
-(define ack (memoize _ack))
-(define (_ack m n)
+(define (ack m n)
   (cond ((= m 0) (+ n 1))
         ((= n 0) (ack (- m 1) 1))
         (else (ack (- m 1) (ack m (- n 1))))))
-
-(define fib (memoize _fib))
-(define (_fib n)
+(define (fib n)
   (if (< n 2)
       n
       (+ (fib (- n 1))
          (fib (- n 2)))))
-
+;
+;; Fast versions:
+;(define ack (memoize _ack))
+;(define (_ack m n)
+;  (cond ((= m 0) (+ n 1))
+;        ((= n 0) (ack (- m 1) 1))
+;        (else (ack (- m 1) (ack m (- n 1))))))
+;
+;(define fib (memoize _fib))
+;(define (_fib n)
+;  (if (< n 2)
+;      n
+;      (+ (fib (- n 1))
+;         (fib (- n 2)))))
+;
 ;; New fast versions that do not introduce any new top-level definitions
 ;(define ack
 ;  ((lambda ()
diff --git a/scheme/cyclone/cps-opt-memoize-pure-fncs.scm b/scheme/cyclone/cps-opt-memoize-pure-fncs.scm
index b07ac358..c0e35bc2 100644
--- a/scheme/cyclone/cps-opt-memoize-pure-fncs.scm
+++ b/scheme/cyclone/cps-opt-memoize-pure-fncs.scm
@@ -29,7 +29,7 @@
   (define cont #f)
   (define (scan exp return locals)
     ;(trace:error `(DEBUG scan ,(ast:ast->pp-sexp exp)))
-    (write `(DEBUG scan ,var ,cont ,(ast:ast->pp-sexp exp))) (newline)
+    ;(write `(DEBUG scan ,var ,cont ,(ast:ast->pp-sexp exp))) (newline)
     (cond
      ;; TODO: reject if a lambda is returned
      ((ast:lambda? exp)
@@ -133,8 +133,8 @@
         (cond
           ((memoizable? var body)
            (let ((new-var (gensym var)))
-            (write `(DEBUG ,var is memoizable))
-            (newline)
+            ;(write `(DEBUG ,var is memoizable))
+            ;(newline)
             ;; TODO: easy to rename function via gensym. however, also
             ;; need to inject this into top-level:
             ;; (define fib #f)
diff --git a/scheme/cyclone/cps-optimizations.sld b/scheme/cyclone/cps-optimizations.sld
index ce11a4a0..6a14fe60 100644
--- a/scheme/cyclone/cps-optimizations.sld
+++ b/scheme/cyclone/cps-optimizations.sld
@@ -1708,12 +1708,12 @@
       (let ((new-ast (opt:inline-prims 
                        (opt:contract ast) -1)))
         ;; Just a hack for now, need to fix beta expand in compiler benchmark
+       (opt:memoize-pure-fncs 
         (if (< (length (filter define? new-ast)) 1000)
           (opt:beta-expand new-ast) ;; TODO: temporarily disabled, causes problems with massive expansions 
                                     ;; in compiler benchmark, need to revist how to throttle/limit this 
                                     ;; (program size? heuristics? what else??)
-          new-ast)
-TODO: integrate (define (opt:memoize-pure-fncs sexp)
+          new-ast))
       )
     )