Sometimes during profiling a program becomes too much slow. To improve this I suggest to add an annotation to disable profiling for a specific function that the programmer knows to be slow.

The profiler will not trace foo() and all static/instance member functions of Bar/Spam:

pragma(notrace) void foo() { /*...*/ }
pragma(notrace) class Bar { /*...*/ }
pragma(notrace) struct Spam { /*...*/ }

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Similarly, I'd also like some way to disable the tracing of a function/class/struct/union coming from another module. This syntax is not good yet:

import foo: pragma(notrace) something;