When viewing an average-size request (few dozens of KB, or hundrers of KB), display performance is just horrible.
The Raw Inspectors take several seconds to display the request (plus they redraw multiple times uselessly, which slows down even more).
This is extremely painful when scrolling thru a capture session, searching for or deleting items... a large request will sometimes get the focus and freeze Fiddler for several seconds. Given the number of times the UI is redrawn, it can easily take 20 or 30 seconds to skip a single request.
Please improve display performance for average-size or large requests (or at the very least eliminate useless redraws, and make the slowdown asynchronous, so that the user can switch to another request if they clicked a large one by mistake).