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When scheduling multiple tasks into RP.getDefault() they all run in parallel. projectui is using this pattern a lot, and it does not seem really appropriate. As issue 169989 and its http://www.netbeans.org/nonav/issues/showattachment.cgi/85908/snapshot.nps show, this can result in many threads refreshing a name of a node running in parallel, which is waste of system threads. Please use dedicated RP for sequencing this work.
Please review core-main#4266a9b86cde
Integrated into 'main-golden', will be available in build *200908080201* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-golden/rev/4266a9b86cde User: Jaroslav Tulach <jtulach@netbeans.org> Log: #170029: Dedicated Project UI RequestProcessor