[fedora-java] Using the natively-built Eclipse compiler

[Bryce McKinlay]

Ziga Mahkovec wrote:

>Ah, much better, thanks.  Here are the revised times (BTW, that's a
>1.5GHz Pentium M):
>
>HelloWorld
>
>ecj                |  ecj-native         |  jikes
>-------------------------------------------------------------
>real    0m1.863s   |  real    0m1.614s   |  real    0m0.067s
>user    0m1.758s   |  user    0m1.536s   |  user    0m0.050s
>sys     0m0.103s   |  sys     0m0.076s   |  sys     0m0.012s
>
>
>GNU Classpath (cd lib; make)
>
>ecj                |  ecj-native         |  jikes
>-------------------------------------------------------------
>real    1m24.539s  |  real    0m24.552s  |  real    0m9.439s
>user    1m23.157s  |  user    0m23.047s  |  user    0m7.486s
>sys     0m1.142s   |  sys     0m1.139s   |  sys     0m0.771s
>
>
>Note that classpath sources need a tiny hack to keep ecj from crashing.
>But that looks like an upstream Eclipse bug, since I could reproduce it
>running ecj with java-1.5.0-sun.
>
>Andrew, I don't suppose you still need oprofile data (or are there other
>places where gcjlib:// loading might be a problem)?
>  
>

The ecj-native times still look somewhat slow. Back in the RHUG days, a 
gcj-compiled ecj was faster than jikes at building classpath. Perhaps 
the BC-ABI stuff is slowing us down a bit.

Bryce