Tied hashes are somewhat slower than regular ones, but if your filling the hashes from a RDBMS then the time taken to get the data will far outweight the speed of access once you have got it.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon

In reply to Re^5: case-insensitive hash keys by BrowserUk
in thread case-insensitive hash keys by ManFromNeptune

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