* Mono now builds on OS X .
* Mono is now self hosting on Linux (although it still seems to crash).
Mono on Linux, Windows, OS X, Solaris and various BSD Unices before JDK 1.4. Following the thread it seems so much like Java:21 % is spent in Array.Copy, 20 % of the time is spent in the various StringBuilder.Append and 15 % is spent in String.BoyerMoore (searching). However, the quality is still way behind that of Java for things like JITing and basic functions (as you would expect for a relatively new, smallish team).