[jira] [Created] (PROTON-1911) Performance issue in EncoderImpl#writeRaw(String)

["Jens Reimann (JIRA)" <ji...@apache.org>]

Jens Reimann created PROTON-1911:
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             Summary: Performance issue in EncoderImpl#writeRaw(String)
                 Key: PROTON-1911
                 URL: https://issues.apache.org/jira/browse/PROTON-1911
             Project: Qpid Proton
          Issue Type: Improvement
          Components: proton-j
    Affects Versions: proton-j-0.28.0, proton-j-0.22.0
            Reporter: Jens Reimann
         Attachments: qpid_encode_1.png, qpid_encode_2.png, qpid_encode_3.png, qpid_encode_4.png

While digging into performance issues in the Eclipse Hono project I noticed a high consumption of CPU time when encoding AMQP messages using proton-j.

I made a small reproducer and threw the same profiler at it, here are the results:

As you can see in the attach screenshot (the first is the initial run with the current code) most of the time is consumed in EncoderImpl#writeRaw(String). This due to the fact that is call "put" for every byte it want to encode.

The following screenshots are from a patched version which uses a small thread local buffer to locally encode the raw data and then flush it to the buffer in bigger chunks.

Screenshot 3 and 4 show the improve performance, but also show that the memory consumption stays low.

 



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