I have indeed tried your suggestion: 

sub to_cache {
    my( $ticker, $data ) = @_;

    $data_cache{$ticker} = pack "(A10FFFFL)*", map @$_, @$data;
}

sub from_cache {
    my $ticker = shift;
    return [
        map[
            unpack("A10FFFFL", $_)
        ], unpack '(A[A10FFFFL])*', $data_cache{$ticker}
        ];
}

[download]
But it doesn't seem to be working. Is this code assuming that the packed rows are stored together as a single scalar?

In reply to Re^10: bit by overhead by Anonymous Monk
in thread bit by overhead by Anonymous Monk

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