Bug 56348 - ReadListener reading stream on different thread very slow
Summary: ReadListener reading stream on different thread very slow
Status: RESOLVED FIXED
Alias: None
Product: Tomcat 8
Classification: Unclassified
Component: Catalina (show other bugs)
Version: 8.0.5
Hardware: PC Linux
: P2 normal (vote)
Target Milestone: ----
Assignee: Tomcat Developers Mailing List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-04-04 14:10 UTC by Yann Simon
Modified: 2014-04-23 21:11 UTC (History)
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Description Yann Simon 2014-04-04 14:10:57 UTC 
In a ReadListener, if the servlet input stream is read with another thread as the servlet thread, the upload is very slow.

The following sample application reproduces the problem:
https://github.com/yanns/servlet31_async/tree/async-perf

/upload2 reads the input stream in the servlet thread
/upload forks a new thread that reads the servlet input stream

My measurements:

With tomcat 8.0.5
/upload: 2 minutes
/upload2: 3,8 s

It is expected that /upload is more slow that /upload2, but not with that difference.

The same tests with jetty:
/upload: 9,5 s
/upload2: 3,7s
Comment 1 Mark Thomas 2014-04-23 21:11:38 UTC 
Thanks for the report and the test case. This has been fixed in 8.0.x for 8.0.6 onwards.