[jboss-dev] AS trunk boot time back to poor?

[David M. Lloyd]

On 01/23/2010 04:37 AM, Tim Fox wrote:
> FWIW.
>
> In profiling JBoss Messaging a couple years ago, we found out that not
> only does the log.debug() (or log.trace()) have an overhead, but the
> actual call to log.isDebugEnabled()/ log.isTraceEnabled() had a
> measurable impact.

That was a couple years ago.  Now, the check amounts to a single compare on 
a volatile int; HotSpot should theoretically be able to inline it into a 
single machine instruction on x86 at least (though I'm not sure that it 
actually does).

- DML