+ {
+ //declaring user categories with RGB colors
+ TRACE_category_with_color ("compute", "1 0 0"); //red
+ TRACE_category_with_color ("request", "0 1 0"); //green
+ TRACE_category_with_color ("data", "0 0 1"); //blue
+ TRACE_category_with_color ("finalize", "0 0 0");//black
+ }