SORT
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Use shared memory to send the scene info into SORT instead of using IO
IO operation is relatively slow comparing with shared memory. It may take me some time because it needs serialisation the whole scene information before starting it.
Since it only takes a little more than 1 second to transfer information through IO, the priority is pretty low.
However serialisation is also necessary before performing rendering task across multiple machines instead of one through network.
Instead of using shared memory to transfer the scene information, using socket would be a more flexible way and easy to extend to support cross machine rendering.
Lower the priority of this task.