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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2018/06/06 09:04:12 UTC

[GitHub] solin319 opened a new issue #11165: ImageIter much slower than ImageRecordIter

solin319 opened a new issue #11165: ImageIter much slower than ImageRecordIter
URL: https://github.com/apache/incubator-mxnet/issues/11165
 
 
   We use ImageIter to read jpg files,.
   batch_size was set to 512. 
   MXNET_CPU_WORKER_NTHREADS set to 48
   It use about 0.35s per batch.
   But it only use about 0.0618s per batch when we use ImageRecordIter to read rec file.
   
   Why ImageIter is too slow?
   Does too many augmenters called in python affect this speed?
   Does MXNet has an interface can do all the task include read,decode,resize,crop,tanspose,rgb_mean in c++?

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