Given the nature of the JIT and the limited size of the translation cache (2 MiB IIRC), applications with huge code bases and little repeat rate (like browsers and MS Word) will perform less well. The poster child for Crusoe was PowerDVD, but Quake had also gotten a lot of attention. Note, in those days there was a surprising amount of self-modifying code. That stuff is really nasty to deal with for a JIT. There was hardware support for detecting this on (IIRC) a 1 KiB granularity (because code was intermixed with data, making the latter look like self-modifying code).