very slow icedtea6 builds

[Andrew Haley]

Matthias Klose wrote:
> 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.

What do you mean by "the building of the jar"?  The building of the components
of the jar, or only the jar command itself?  This isn't clear.

Andrew.