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Executing external VCS commands brings the CPU to 100% for a few seconds. This is due to the existing patch for OpenVMS and OS/2 in the OutputGrabber which heavily polls the external output and error streams of the external command.
Created attachment 22133 [details] Proposed patch removing stream polling
BTW, the patch has been tested on Windows XP and Solaris 9, with CVS and Subversion command line profile as well as on OS/2.
No recent JVM for OS/2 which is able to run NetBeans.