Benchmark DALI decoding for pytorch and tensorflow

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Stale
Tech stack
python, pytorch, tensorflow
Domain
performance

Research direction

No repository file or test is named. Start with NVIDIA DALI's AudioDecoder and compare single-threaded ETL timing against TensorFlow I/O's audio/decode_wav and torchaudio; done means a reproducible benchmark result addressing whether DALI improves throughput.

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Description

I totally missed that DALI added audio decoding ops. As far as I can see, the ops seems to be based on sndfile and do not support GPU decoding. I wonder if this would still improve single threaded ETL speed on pytorch or tensorflow.

pinging DALI devs @mzient @szalpal as they might have benchmarked the op against tfio or torchaudio which are also sndfile based.

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Python
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