tag:blogger.com,1999:blog-6098392112071095875.post7695342274879035914..comments2010-11-21T19:18:07.325-05:00Domingos Netonoreply@blogger.comBlogger5125tag:blogger.com,1999:blog-6098392112071095875.post-26857848225276820062008-12-23T11:01:00.000-05:002008-12-23T11:01:00.000-05:00Stanimir: that method looks like something I could use. Thanks!<BR/><BR/>Do you know how I can use that method from inside a Java process without having to write an instrumentation agent? It would make life much easier!Domingos Netohttp://www.blogger.com/profile/16748499695622931125noreply@blogger.comtag:blogger.com,1999:blog-6098392112071095875.post-69199988277121763572008-12-23T11:00:00.000-05:002008-12-23T11:00:00.000-05:00Cédrik, thanks for the info!<BR/><BR/>I was aware of the existence of some of those implementations, but not all.<BR/><BR/>But I was never intending to do something really useful: I just wanted to put the theory in the previous post in practice :)Domingos Netohttp://www.blogger.com/profile/16748499695622931125noreply@blogger.comtag:blogger.com,1999:blog-6098392112071095875.post-32860145413810222592008-12-22T18:08:00.000-05:002008-12-22T18:08:00.000-05:00<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/instrument/Instrumentation.html#getObjectSize(java.lang.Object)" REL="nofollow">java.lang.instrument.Instrumentation.getObjectSize(Object objectToSize)<BR/></A>Stanimir Simeonoffhttp://www.blogger.com/profile/15526543718385237177noreply@blogger.comtag:blogger.com,1999:blog-6098392112071095875.post-34244302573316883702008-12-19T06:35:00.000-05:002008-12-19T06:35:00.000-05:00Great, one more implementation of sizeof() in Java! :-)<BR/><BR/>Others include (in no particular order):<BR/>NetBean's <A HREF="http://performance.netbeans.org/insane/" REL="nofollow">Insane</A> lib<BR/><A HREF="http://www.javaspecialists.eu/archive/Issue078.html" REL="nofollow">JavaSpecialist's take 1</A><BR/><A HREF="http://www.javaspecialists.eu/archive/Issue142.html" REL="nofollow">JavaSpecialist's take 2</A><BR/><A HREF="http://jroller.com/page/maxim?entry=again_about_determining_size_of" REL="nofollow">a blog entry</A><BR/><A HREF="http://sizeof.sourceforge.net/" REL="nofollow">SizeOf project (GPL)</A><BR/><A HREF="http://www.javaworld.com/javaqa/2003-12/02-qa-1226-sizeof_p.html" REL="nofollow">Vladimir Roubtsov's article</A><BR/><BR/>There may be others I am not aware of... ;-)<BR/><BR/>For the record, I am using a slightly modified version of Vladimir Roubtsov in <A HREF="http://messadmin.sourceforge.net" REL="nofollow">MessAdmin</A> to measure the size of an HttpSession.<BR/><BR/>That said, your implementation is one of first to take into account memory alignment and 32/64 bit architecture. I may very well switch to your implementation, as we have compatible licenses. In the meantime, you may be interested to have a look at MessAdmin's source code to learn about some edge cases (read bugs) that can trigger bad things when reflecting on some objects. Contact me by email for more details.Cédrikhttp://messadmin.sourceforge.netnoreply@blogger.comtag:blogger.com,1999:blog-6098392112071095875.post-34145262516785075432008-12-19T06:20:00.000-05:002008-12-19T06:20:00.000-05:00Nice work Domingos.Jorge Ferreiranoreply@blogger.com