Cancelling OQL query leaves the background computation thread running while pretending the query has been cancelled. This can lead to unnecessary CPU load slowing down the user system as well as the IDE.
fixed in http://hg.netbeans.org/profiler-main/rev/ce7604b3ca10
Integrated into 'main-golden', will be available in build *201008250001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Jaroslav Bachorik <firstname.lastname@example.org>
Log: #189627: Cancelling OQL query doesn't stop the background computation