Hello ruby people,
  I've tried to make some speed test in ruby to find out how fast is 
searching in hash (using has_key?)

The results were OK but I discovered curious thing -- when i generate 
big hash the speed is different when i unserialize (marshal.load) the 
same hash.

Unserialized Hash is 1.5x faster in has_key? method. Tried it with 
GC.disable as well, results were same.

What am I missing?

Thanx for any ideas