[Opensymphony-oscache] Performance of throwing NeedsRefreshException for missing keys

Oops,

i have found the comment in the NeedsRefreshException Source just 3 minutes, too late ;-)

"<p>January, 2004 - The OSCache developers are aware of the fact that throwing
 * an exception for a perfect valid situation (cache miss) is design smell. This will
 * be removed in the near future, and other means of refreshing the cache will be
 * provided.</p>"

But I still wonder, how big the perfomance impact is.

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