Hello Sebb, My answers below. Regards Philippe
On Mon, Jan 21, 2013 at 6:22 PM, sebb <[email protected]> wrote: > On 21 January 2013 12:28, Philippe Mouawad <[email protected]> > wrote: > > Hello, > > Java 7 introduced ThreadLocalRandom which has much better performances > than > > using Random as static instance. > > See: > > > > > http://docs.oracle.com/javase/tutorial/essential/concurrency/threadlocalrandom.html > > > http://niklasschlimm.blogspot.fr/2012/01/java-7-how-to-write-really-fast-java.html > > > > > > Implementation is here for Java6 but can we use it with Apache License ?: > > > https://github.com/codahale/metrics/blob/master/metrics-core/src/main/java/com/yammer/metrics/stats/ThreadLocalRandom.java > > That appears to be public domain. > Not sure of whether that is allowable or not. > > > > > Or should we migrate to Java 7 as Java6 will be soon EOL ? > > Is the performance of Random a significant problem for JMeter? > Does it affect all tests? Or just some test elements? > If not, then I don't think it's worth the effort. > I will affect: - RandomVariableConfig - RandomController - RandomTimer - RegexpExtractor => Used a lot - HtmlExtractor => Hope it will be :-) - __regexFunction - AnchorModifier So maybe we could at least impact: - RegexpExtractor => Used a lot - HtmlExtractor => Hope it will be :-) - RandomController > > As to whether to require Java 7, I suspect Java 6 will still be used > by many (especially businesses) until long after EOL (and remember > users can pay to have longer support). > I agree with you this policy applies for Application servers, but for tools like JMeter I don't think it does. From my experience as a JMeter user, we always were able to have a particular Java version installed. > > If a move to Java 7 would allow the use of new APIs that provide > significant performance improvements then it might be worth doing. > But we do need to be aware that requiring Java 7 as a minimum may well > exclude some users. > Same answer as before. I think if we cannot use ThreadLocalRandom as copy / paste in JMeter source, it is worth thinking about moving to Java 7. Who can help us on this license problem ? > > > Regards > > Philippe M. > -- Cordialement. Philippe Mouawad.
