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From Marshall Schor <...@schor.com>
Subject Re: source of some unusual profiling measurements
Date Thu, 02 Oct 2008 14:20:00 GMT


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
>
>
>   

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