With very large documents the embedded search freezes the UI

If one edits large test documents ( > 150 MB) this works quite nice in Eclipse except if one uses the embedded search control.

The problem is that when one enter a character that is contained in the document it tires to highlight matches, this then could take very long and freezes the UI in the meanwhile.

I'm not sure what is slow, the search itself or the highlight of the results, but one idea would be to only perform the highlight for the portions of the document that is currently visible (+/- a few lines) and update only when the document is scrolled.