On Fri, 29 Mar 2002 12:38, Ceki Gülcü wrote:
> 1) logging calls are made thousands of times so the indirection through
> an equalizer API (like commons-logging) has a performance impact
Not in modern JVMs (read most almost all jdk1.3 impls).
As long as the underlying indirection (ie between commons and Log4j) is done
via a final variable then the cost is zero due to JVM optimizations. Theres
still the cost of the dynamic dispatch between user land code and commons
code but that cost is very very minimal compared to the rest of the logging
operations.
The cost comes in constructing the string objects (which is literally
thousands times more expensive than a dynamic dispatch) and routing the log
message.
As long as the API supports functions like isDebugEnabled() (which I believe
commons does? or at least did) then the performance cost is so negligable to
be unimportant.
--
Cheers,
Pete
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