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From PEREZ ALCAIDE JESUS <jpere...@servexternos.isban.es>
Subject Performance loss with MyFaces 2.1.7
Date Fri, 11 May 2012 11:18:24 GMT
Hello,

I've done a performance test comparing between versions of MyFaces 2.1.6 and 2.1.7. The result
has been that version 2.1.7 has a worse performance, about 25% worse in requests per second
and about 50% worse in response time. These data are obtained by doing load tests on a server
until it reaches saturation (the CPU reaches a 90-100% usage).

Comparing with JProfiler two executions of these load tests, one with version 2.1.6 and one
with version 2.1.7, we see clearly that the problem seems to be that the number of invocations
of the method Thread.getContextClassLoader () has increased significantly (+300k invocations
more) and has therefore increased the time in this method (+50 s).

This change comes from the solution to the bug MyFaces-3510 [1] where a change was made on
_ComponentAttributesMap class.

Leonardo, what do you think about this?

Should I reopen the bug MyFaces-3510 or create a new bug?

[1] https://issues.apache.org/jira/browse/MYFACES-3510


Un saludo,

Jesús Pérez Alcaide
Lab. Banksphere - Runtime
Tlf:  91 470 5223



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