You can save another ~25% or so on large bitstrings by avoiding duplicating the bitvector. Just use the aliasing nature of the elements of @_: 

sub unpack_count_ref { 
    my $count = unpack("%32b*", $_[ 0 ] );
    return $count;
}

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In reply to Re: An array of boolean values in a bitfield by BrowserUk
in thread An array of boolean values in a bitfield by kyle

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