in reply to Clearing an Array of Array's from memory

You can undef the array by doing the following: 
undef(@myarray);

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This will make @myarray = undef. I don't believe clearing it out will slow down your program any despite the size of the array.

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Re^2: Clearing an Array of Array's from memory (=undef)
by tye (Sage) on Aug 29, 2003 at 17:57 UTC
    This will make @myarray = undef.

    I suspect this is just a case of casual, imprecise language, but you are likely to mislead people with that particular phrasing: 

        my @myarray = undef;
    print "\@myarray contains ", 0+@myarray, " elements.\n";
__END__
Produces:
    @myarray contains 1 elements.

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    Because     @myarray = undef; is the same as     @myarray = ( undef ); which isn't at all the same as     undef @myarray; undef is a function that undefines what is passed to it and then returns a not-defined() scalar value.

                    - tye
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