--perf_instrument parameter now has int type and 0, 1, 2 modes (1 - simple trees, 2 - expanded trees for functions with same name but different calling address);

Maximum depth limit var was added to the instrumentation structure;

Trace names output console output fix: improper tree formatting could happen;
Output in case of error was added;

Custom regions improvements;

Improved timing and weight calculation for parallel regions; New TC (threads counter) value to indicate how many different threads accessed particular node;

parallel_for, warnings fixes and ReturnAddress code from Alexander Alekhin;

modules/imgproc/src/histogram.cpp

@@ -1188,8 +1188,6 @@ public:
 
     virtual void operator() (const Range & range) const
     {
-        CV_INSTRUMENT_REGION_IPP()
-
         Ipp32s levelNum = histSize + 1;
         Mat phist(hist->size(), hist->type(), Scalar::all(0));
 #if IPP_VERSION_X100 >= 900