function MyFunc(a : Integer) : String; overload;
function MyFunc(s : String) : String; overload;

In many other languages, the overload directive is implicit, you don’t have to type it and you can always overload. On the other hand, it means that as long as your parameters differ, you can end up overloading an existing function without noticing, which can lead to confusion.
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How familiar are you with code profiling and/or Delphi code optimization? Can you tell apart instrumenting and sampling profilers merely by their respective heisenbugs, or is that profiler business sounding like a TV series from the last century?