wkcn commented on issue #9939: add multi proposal operator (cpu version) and fix the bug in proposal op (gpu version) URL: https://github.com/apache/incubator-mxnet/pull/9939#issuecomment-370447850 @marcoabreu The reason to add USE_STABLE_SORT_FOR_PROPOSAL flag is for the cpu/gpu consistency test. Proposal Operator (CPU) uses unstable sort to sort the anchors by scores, however Proposal Operator (GPU) uses stable sort. For the performance, I couldn't replace unstable sort with stable sort in Proposal (CPU). And for the cpu/gpu consistency test, I think it's necessary to use a building flag to test these operator.
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