The GPU compositor and the new CPU compositor return zero for the Speed pass, that's because the output identifier was used as the pass name which is not guaranteed to work for existing files. To fix this, use the socket data pass name instead.
The GPU compositor and the new CPU compositor return zero for the Speed pass, that's because the output identifier was used as the pass name which is not guaranteed to work for existing files. To fix this, use the socket data pass name instead.