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From Michael Becke <be...@u.washington.edu>
Subject Re: performance issue
Date Tue, 29 Jul 2003 15:43:47 GMT
Take a look at Sun BUG ID 4512028.  This bug was introduced in 1.4.0 and 
was fixed in 1.4.1.  It appears to effect only Windows.

Mike

Michael Becke wrote:
> It does appear to JDK 1.4.0.  I just installed 1.4.0_04 on Windows 2000 
> and beta2 is significantly slower (almost by a factor of 10).  Removing 
> the isStale() check fixes the problem in this case.  It seems 1.4.0 does 
> not do well with SO_TIMEOUT.  This does not seem to be a problem with 
> Sun 1.3.1 and 1.4.1. or IBM 1.3.0.
> 
> Mike
> 
> twolff@austin.rr.com wrote:
> 
>> Well ... there must be something different about my environment.  The
>> results with JBoss3.2.1-tomcat4.1.24 were much worse! (I decreased 
>> threads
>> to 5 and messages per thread to 10 since tomcat defaults max threads per
>> servlet somewhere and I didn't want to dig for the setting.)
>>
>> alpha3 .034 minutes
>> beta2  .167 minutes
>>
>> Could it be the jdk?  I'm running 1.4.0 on XP Pro service pack 1.  I 
>> could
>> try downloading and installing the most recent version of the jdk, 
>> running
>> the test on a different machine ... hmmmmm.
>>
>> Also, I'm using the binaries off of the site rather than compiling from
>> source against the jdk on my machine.  Unfortunately, I won't have 
>> time to
>> work on this any further until later this evening :-(
>>
>>
>> Todd
>>
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