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Date: Thu, 02 Oct 2008 10:35:47 -0400
From: Marshall Schor <msa@schor.com>
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To: uima-dev@incubator.apache.org
Subject: Re: source of some unusual profiling measurements
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Well, putting in an if statement around the tracing call helped, but
just a little - in the particular test scenario I'm running, the total
time spent in this method (excluding descendant calls) droped from 150
ms to 140 ms.  So the time is being spent elsewhere - not sure where...

-Marshall

Marshall Schor wrote:
> Marshall Schor wrote:
>   
>> While measuring / profiling uima-as - I've notices some unusually high
>> time being spent in methods that are practically empty - e.g. "delegate"
>> method of "HandlerBase" class.
>>
>> It turns out that the uima-as code has lots of tracing to the log,
>> normally disabled.  We had previously discovered that it payed to avoid
>> calling "logrb" with all of its arguments, if logging wasn't enabled for
>> that level, so in the base uima code all the logger calls are wrapped
>> with an if statement testing first if that logging level is enabled,
>> thus avoiding computing the arguments of logrb. 
>>
>> This wrappping is missing in the newer uima-as code - I'm thinking that
>> this might account for the unusually high % of time being observed.  I
>> haven't been able to test this though - my profiling experiments started
>> to hang after I made this change.
>>   
>>     
> Well, they didn't hang using yourkit - they just were taking 200x longer
> to run (and I thought they were hung...)
> -Marshall
>   
>> -Marshall
>>
>>
>>   
>>     
>
>
>