On 29/12/15 11:39, Steven Schlansker wrote:
> JMH is an awesome harness for constructing exactly these sorts of performance tests:
> http://openjdk.java.net/projects/code-tools/jmh/
>
> If we care about driver performance, it might be interesting to construct
> some representative tests and include them as part of the build process, to
> ensure that metrics we care about don't get regressions. Obviously this would be
> some work that needs volunteers interested in working on it, just an idea to think on.
>
>
> And while we're bikeshedding, I personally would -1 the "only one exit per function".
>
> Sometimes it's nice to bail early e.g. :
>
> if (offset == length) { return 0; }
> ... do work ...
> return result;
[...]
Sorry , don't have time to reply in depth, possibly in about a week
(holiday).
Only one exit per function works best when it is an absolute rule - with
possibly very rare exceptions, and I've yet to see a valid exception in
over 40 years of programming.
In practice, having multiple returns is unnecessary & makes code harder
to read.
Remember the Just-in-Time compiler is very good at optimising, even way
back in the JDK 1.6 days, and we're now up to 1.8!
Cheers,
Gavin