Re: [weld-dev] A significantly negative article on Weld

Sorry to drop in here, but I think there might be a conceptional problem. Why do we pickup each and every class as @Dependent? In most cases this is either unnecessary or even leads to AmbiguousResolutionExceptions. I'd strongly favour to drop this and instead only pickup a bean as managed if it has a scope annotation or a few other very limited cases. This would also highly increase startup time imo... LieGrue, strub --- On Wed, 11/10/10, Stuart Douglas <stuart.w.douglas(a)gmail.com&gt; wrote: From: Stuart Douglas <stuart.w.douglas(a)gmail.com&gt; Subject: Re: [weld-dev] A significantly negative article on Weld To: "Pete Muir" <pmuir(a)bleepbleep.org.uk&gt; Cc: "Samuel Mendenhall" <samuel.mendenhall(a)gmail.com&gt;, "Weld Dev List" <weld-dev(a)lists.jboss.org&gt; Date: Wednesday, November 10, 2010, 9:12 AM I just ran some very quick and dirty profiling with the latest Jbossas and the results are as follows: Beans Startup Time Startup (WELDX) Memory Usage Mem Usage(no beans.xml) No Deployment 17 135 20 20 22 149 500 24 26 178 2000 35 43 265 5000 87 104 440 210 So jboss uses 135Mb normally, and 210Mb when a war with 5000 classes is deployed that does not have beans.xml. When you add weld to the mix the memory usage jumps by 230Mb to 440Mb. According to yjp WeldClassImpl (and it's retained WeldMethod/Field etc) is responsible for 120Mb of this. Other major culprits seem to be TypeSafeObserverResolver at 24Mb (as it is caching ProcessAnnotatedType<Bean*> * 5000) and TypeSafeDecoratorResolver at 13Mb. Not much else stands out. The beans used where quite simple (1 injection point, 7 fields, 6 methods), no normal scoped beans, no interceptors, not decorators. Weldx does have a notable effect on startup time, which I will also investigate. I don't think it will be to hard to significantly reduce this. Reducing the number of HashMap's in WeldClassImpl (and replacing some with ImmutableArraySet) should give a significant gain, and clearing the TypeSafeObserverResolver and TypeSafeDecoratorResolver after startup should also save around 40Mb. I'll try and do some work this week and see how much I can get this down. Stuart On 10/11/2010, at 8:48 AM, Pete Muir wrote: I'm about to post a blog about this. On 9 Nov 2010, at 21:43, Lincoln Baxter, III wrote: Are these points valid? If so, are we aware of them? Just trying to raise awareness to what people are saying out in the world. I have noticed a relatively high memory footprint in Seam Forge, using Weld SE. http://www.dzone.com/links/r/cdi_a_major_risk_factor_in_java_ee_6.html Is there anything we can address here and attempt to demystify this blog? -- Lincoln Baxter, III http://ocpsoft.com http://scrumshark.com "Keep it Simple" _______________________________________________ weld-dev mailing list weld-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/weld-dev _______________________________________________ weld-dev mailing list weld-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/weld-dev -----Inline Attachment Follows----- _______________________________________________ weld-dev mailing list weld-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/weld-dev