On Nov 18, 2011, at 4:34 PM, Thomas Mortagne wrote: > On Fri, Nov 18, 2011 at 4:27 PM, Vincent Massol <[email protected]> wrote: >> Hi devs, >> >> I've been finding that Jetty takes a lot of time to start lately. So I've >> run some profiling on it. >> >> Starting Jetty (till the STARTING message) takes 15 seconds on my machine >> (in debug mode, we win 3 seconds, ie 12s start time), split like this: >> >> * 50% of the time spent scanning jars in WEB-INF/lib >> (JarInputStream.getNextJar()) - 7s >> * 10% in Jetty itself - 2s >> * 40% in our code in Extension Manager init (2.5s) and in Component >> registration from their annotations (2.5s) - 5s >> >> If I remove the start of the EM in XWikiServletContextListener, we start in >> 7 seconds (instead of 15s) > > You meant CM, right ?
right…. sorry -Vincent >> If I try to start Jetty without any webapp, it starts in 500ms. >> >> If I remove the oldcore legacy jar (2.5MB) we win 1 second in start up time. >> >> Note: This is all before XWiki.init() is called on the first request. >> >> Analysis of ComponentAnnotationLoader (2.5s): >> * 1.2s just loading classes from the CL >> * 1s getDeclaredFields (reflection API) >> * 800ms initializing SLF4J >> >> Analysis of Extension Manager init (2.5s): >> * In DefaultCoreExtensionScanner.loadExtensions(): >> ** 500ms URL.toURI() >> ** 500ms MavenXpp3Reader.read() - POM reading >> ** 150ms org.Reflections scanning >> ** 150ms resource loading from CL (getResourceAsStream()) >> * In DefaultExtensionLicenseManager.initialize() >> ** 314ms in org.Reflections >> * 130ms of loading xwiki.properties >> >> Conclusion >> ========= >> >> * XWiki's size in number of JARs and their sizes makes it long to start >> Jetty. >> * We could make some small optimizations in EM and Component loading but we >> wouldn't win that much, on the order of 2s in total (i.e. 15% of total load >> time) >> >> Thanks >> -Vincent >> >> _______________________________________________ >> devs mailing list >> [email protected] >> http://lists.xwiki.org/mailman/listinfo/devs >> > > > > -- > Thomas Mortagne > _______________________________________________ > devs mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/devs _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
