pcmanfm built-in search vs. catfish

[farinet at arcor.de]

Always on a powerbook g4 (no other device here in this moment, because 
i'm moving ;) ):

Recently i had some problems using the built-in Search feature of 
pcmanfm. Therefore, i newly tried out catfish (there is a nice 
instruction how to use it integrated to pcmanfm as a right-click menu). 
And i found out catfish is way way faster!?!

Is that normal behaviour or is there, presumeably, broken something in 
my setup?