It looks like there's no need to release the CPU anymore.

src/plugins/cppeditor/cppchecksymbols.cpp

@@ -690,7 +690,6 @@ void CheckSymbols::flush()
     if (_usages.isEmpty())
         return;
 
-    FriendlyThread::msleep(10); // release some cpu
     reportResults(_usages);
     _usages.clear();
 }