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From "Michael Mikhulya (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TAP5-2337) Reduce number of calls of AbstractStringBuilder.expandCapacity
Date Mon, 19 May 2014 18:30:39 GMT
Michael Mikhulya created TAP5-2337:
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             Summary: Reduce number of calls of AbstractStringBuilder.expandCapacity
                 Key: TAP5-2337
                 URL: https://issues.apache.org/jira/browse/TAP5-2337
             Project: Tapestry 5
          Issue Type: Improvement
            Reporter: Michael Mikhulya
            Priority: Minor
         Attachments: 0001-TAP5-2337-Reduce-number-of-calls-of-AbstractStringBu.patch

During profiling of Tapestry framework I found that AbstractStringBuilder.expandCapacity is
called very frequently.

There is a patch that get rid of creation StringBuilder with following calls of expandCapacity
(which allocate memory and copy current content into it).

I have to thank Dmitriy Ilyin, who helped me to investigate the issue and to find the simplest
solution (actually we get a little bit less code while improving performance).

With this improvement time per request decreased on 0.5ms (1% of overall time)on our test.
All measurements were done with apache benchmark after warm up phase.



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