The sum of all threads execution in CPU snapshot does not make much sense. It will be better to hide it.
Fixed in profiler-main
user: Tomas Hurka <email@example.com>
date: Mon Aug 10 21:37:52 2009 +0200
summary: issue #170161, hide the root node of the tree table
Integrated into 'main-golden', will be available in build *200908111401* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Tomas Hurka <firstname.lastname@example.org>
Log: issue #170161, hide the root node of the tree table