The d3 library we're using for rendering the flame graph has examples for how to do simple search where matches are highlighted in the graph.

We should do something clean here - a simple text field, whatever is entered is highlighted, either when enter is pressed or focus is lost, or if it is fast enough, whenever a key is pressed. I don't think we need the buttons for resetting zoom and clear, but whatever the implementor thinks works and looks best is good enough for me. Just make sure it doesn't use too much vertical screen estate (it does in the demos).