xianyujie commented on issue #15108: The test time of the model on GPU is normal, but the test time on CPU is very long. URL: https://github.com/apache/incubator-mxnet/issues/15108#issuecomment-498128806 Here, I tested the run time of different network layers on one image, I found that the problem occurred in most of the conv2_weight layers. Tested on CPU, no mkl build, the first col shows my model, the second col shows the original model, the third col shows the network layer name. [all_output_time_contrast.txt](https://github.com/apache/incubator-mxnet/files/3246126/all_output_time_contrast.txt)
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