ciyongch commented on issue #14914: Add primitive cache for MKL-DNN sum(elemwise_add operator URL: https://github.com/apache/incubator-mxnet/pull/14914#issuecomment-490793808 Here's some performance data I collected based on a customer case, primitive cached brings ~1.6x speedup for `elemwise_add` operator, which help to reduce the overall percentage: **1) Don't cached sum primitive (current code base)** | Op name | total time(ms) | ave time (ms) | ncalls | percentage | | ------------ | -------------- | ------------- | ------ | ---------- | | elemwise_add | 382.533 | 0.4 | 920 | 24.96% | **2) cached sum primitive** | Op name | total time(ms) | ave time (ms) | ncalls | percentage | | ------------ | -------------- | ------------- | ------ | ---------- | | elemwise_add | 230.243 | 0.25 | 920 | 18.29% |
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