We decided it was necessary, and we have addressed the performance issues with hlsearch before the official release. This new version, RC2, works fast for scrolling even in my lowly but lovely Asus EEE PC 1005. It should fly on anything else. Search/replace may still be slow, we’ll address that in a future version.
If nothing acts up, this will become the official ViEmu 2.5 for VS2010 in a couple of days. All feedback is welcome.