edmBernard commented on issue #8427: Bug: ThreadedEnginePerDevice: speed variation with mixed Mxnet API and Amalgamation API URL: https://github.com/apache/incubator-mxnet/issues/8427#issuecomment-341637172 I just realize that ThreadedEnginePerDevice should have the same impact than NaiveEngine since I don't use GPU :( On separated script I got these timing: | MXNET_ENGINE_TYPE | API | time (s) | | -- | -- | -- | | `NaiveEngine` | Module API | 12.8s | | `NaiveEngine` | Amalgamation | 12.3s | | `ThreadedEngine` | Module API | 0.9s | | `ThreadedEngine` | Amalgamation | 1.1s | If launch several time the same API in the same script I got the same time on all iteration. Time change if I mixed Amalgamation and Module API on the same script: | MXNET_ENGINE_TYPE | API | time (s) | | -- | -- | -- | | `NaiveEngine` | Amalgamation / Module API / Amalgamation | 12.6s / 12.9s / 12.6s | | `ThreadedEngine` | Amalgamation / Module API / Amalgamation | 1.4s / 0.9s / 0.9s | | `ThreadedEnginePerDevice` | Amalgamation / Module API / Amalgamation | 12.8s / 0.7s / 0.78s |
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