Hendi created NETBEANS-1185:
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Summary: Application extremely slow under debugger, then freezes
Key: NETBEANS-1185
URL: https://issues.apache.org/jira/browse/NETBEANS-1185
Project: NetBeans
Issue Type: Bug
Components: debugger - Java
Affects Versions: 9.0
Environment: Windows 10 x64 (1709), JDK 10.0.2, Core i7 6700K, 16 GB
RAM
Reporter: Hendi
I have a rather large Java project with over 600 source files. It is a console
application, no GUI code. At startup it loads a lot of data (among other things
it memory-maps some files that are around ~500 MB). When left unconstrained, it
uses around 1.1 GB of memory once it is done, but it also works fine withÂ
-Xmx768M. When not running under a debugger, it takes around 1 minute to
complete loading.
When launching it using NetBeans' debugger, however, it never completes. It
will load for around 5 minutes (at which point it still isn't even half
done..), then CPU usage for the process goes to 0% and netbeans64 sits at 12.5%
(seems like a single thread running a spin loop or so). I use the current
release version of NetBeans 9 running under JDK 10.0.2.
When I was still using NetBeans 8.2 with JDK 8, it was fine. Debugging was only
marginally slower than launching it without a debugger.
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