Purpose:Ah, the wonders of science. This may be a non-issue for some but in the interests of equal time, check out their results here.
Recent benchmarks have shown optimized source code for the Pentium 4 to be faster than an Athlon at DIVX encoding. This is not necessarily the case given equal attention to coding for the Athlon.
New version is more than twice as fast as the old one. When will it be finished? Not until the Intel Pentium 4 is completely embarrassed ;) Adding the new optimized code was quite painless and took all of one hour to add. ;)