Its a good idea to avoid globals (esp fake globals), pass arguments instead 

doWork( $coverage, $t );

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This might have an effect on memory (or might not), but its a good idea for code maintenance :)

OTOH, perl can give memory back to the OS, it does so frequently on win32, see Re^2: Memory Leak when slurping files in a loop/demonstrate that perl can give back memory to the OS

In reply to Re: Unexplained memory hogging by Anonymous Monk
in thread Unexplained memory hogging by richardwfrancis

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