pengzhao-intel commented on issue #12997: A better take forward kernel for CPU URL: https://github.com/apache/incubator-mxnet/pull/12997#issuecomment-434959018 @HyperZealot I suggest to using an environment `MXNET_CPU_PARALLEL_COPY_SIZE` to decide when use `memcpy` or OMP copy as in #12926. The num_cols=8 case in here is just an indicator to cover different scenario.
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