thats most of the benchmarking

strange about the puts in soml, hard to see where a factor of 10 would
come from

lib/soml/parfait/integer.soml

@@ -105,6 +105,7 @@ class Integer < Value
 
   Word to_s()
     Word start = " "
+    start.set_length(0)
     return as_string( start )
   end