On Saturday 31 Mar 2012 04:03:10 Zlatin Balevsky wrote:
> >>
> >> In 'log.info("Random message: %s", obj.toString())' evaluating
> >> 'obj.toString()' was what caused issues, not recycling it, or so I believe
> >> to remember.
> >
> > You don't need to call obj.toString() before calling log() - just pass the
> > object itself. Then the only overheads are:
> > 1) Calling the function, including passing the arguments - which hopefully
> > will be optimised to be on some stack (but the code might not have been
> > JITted yet).
> > 2) Looking up whether it needs to be logged.
> >
>
> 3) Autoboxing because you cannot pass a primitive if the argument is
> Object without creating a <? extends Number>. Small ranges of
> Char/Short/Integer/Long values are cached, anything outside those will
> end up creating garbage if the shouldLog predicate evaluate true even
> once.
Will it still autobox them if they are on the stack, and never used?
>
> ... but you could get around this problem by adding many log functions
> with different signatures that take primitives. The burden then falls
> on the programmer to find the appropriate function at each call site.
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