I just did a quick comparison of 2 popular AviSynth builds and thought I may as well put the results up here in case other people were wondering.
I compared XhmikosR’s AviSynth_258_MT_MSVC2010 (27 March 2011 build) (download link) with SET’s 2.6 Alpha 2 build (download link)
I did 5 tests per build and the average framerates were:
In other words there is a speed advantage of over 1% when using SET’s over XhmikosR’s.
I also had similar results when comparing XhmikosR’s MVTools2 build with the official one.
The official one had an average framerate of 15.68 while XhmikosR’s was 15.28, which means the official is faster by roughly 2.5%.
So with these results I will continue to recommend SET’s 2.6 as the best AviSynth build to use. It seems to be the most stable and the fastest 🙂