ThomasDelteil commented on issue #11165: ImageIter much slower than 
ImageRecordIter
URL: 
https://github.com/apache/incubator-mxnet/issues/11165#issuecomment-402883360
 
 
   @solin319 If you are willing to use Gluon I would suggest combining the 
`ImageFolderDataset` and `DataLoader` with `num_workers` >> 1 . The data 
loading is performed asynchronously on several processes and the data is 
pre-fetched in advance for you.
   
   Have a look at this tutorial: 
https://mxnet.incubator.apache.org/tutorials/gluon/datasets.html#using-own-data-with-included-datasets
   
   @solin319 Please consider closing if your query has been answered. Thanks!

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