<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi Is there a way of getting a stacktrace from this tool, so we could see where the /proc/self/map access is coming from? Regards, Noel. Michael Meeks wrote: <blockquote cite="mid:1319036866.5425.321.camel@lenovo-w500" type="cite"> <pre wrap=""> On Wed, 2011-10-19 at 16:34 +0200, Stephan Bergmann wrote: </pre> <blockquote type="cite"> <blockquote type="cite"> <pre wrap="">(the number is not always 72) that is repeated more or less identically some 12,000 times in the 7 minute run. Since each set appears to take around .02 seconds that alone would account for some 4 minutes of the run. </pre> </blockquote> <pre wrap=""> 7321 times reading out /proc/self/map -- no idea why it does that, but that clearly ain't no good... </pre> </blockquote> <pre wrap=""> Yep :-) If I remember rightly - the only moving part in this side-to-side performance comparison that causes a substantial decrease in performance is Java 7 vs 6 right ? The strace shows it poking at /proc/self/map endlessly (something that is not done by any LibreOffice code I can find off hand), which perhaps helps isolate the problem rather better ? Ideally of course, we would have a native SQLite database to avoid needing to use that hsqldb thing (as you do) - potentially it is provoking java performance problems by using a method call that used to be fast but is now slow; or ... ? So - it's not clear what best to do about this really, Is there a good java profiler out there we could use on a mixed C++ / Java process like ours ? Thanks, Michael. </pre> </blockquote> <hr>Disclaimer: <a href="http://www.peralex.com/disclaimer.html">http://www.peralex.com/disclaimer.html</a> </body> </html>