very slow icedtea6 builds

[Matthias Klose]

Kelly O'Hair schrieb:
> The construction of the rt.jar (or maybe rt-orig.jar in the Makefiles)
> can be very slow, lots of disk activity in creating it.
> 
> The hotspot build will likely be the CPU intensive one (parallel make,
> high opt),
> but the rest of the jdk (images in particular) is much more disk intensive.
> The faster the disk drive and the faster the local disk, the better.
> 
> The number of bytes just moving from one place on the disk to another
> is pretty intense.

the build is done on a striped two disk array (WD Raptor 10k disks), so I don't
think the build is limited by IO (plus I didn't change the config during the
last six months).  Somebody had the suspicion that the build doesn't use the
jit, but I didn't find out yet if this is true.

  Matthias