dbi: prepare vs prepare_cached -- which is best ?

man page and this node explains a little about prepare_cached. It will return the statement handle w/o contacting the database server if it is already compiled.
Here are my questions.
1) why it should contact the db server to compile ?
2) which is best, prepare or prepare_cached ? And in which case which is best ?
3) Is there any comparison available ?
Sathiyamoorthy

In reply to dbi: prepare vs prepare_cached -- which is best ? by sathiya.sw

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