leezu edited a comment on issue #13447: Rewrite dataloader, improves responsiveness and reliability URL: https://github.com/apache/incubator-mxnet/pull/13447#issuecomment-445431341 @anirudh2290 multiprocessing is often extremely inefficient. The reason is that any object that is passed between the processes must first be pickled and unpickled. Pickling is very slow. Using multi-threading of course requires extra care to bypass the GIL, but can make sense if the pickling overhead is too much. I assume @kohillyang has such case.
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