very slow icedtea6 builds

[Kelly O'Hair]

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.

-kto

Matthias Klose wrote:
> all builds done on local disk (and both based on b10).
> 
>   Matthias
> 
> Kelly O'Hair schrieb:
>> Local disk or network disk?
>>
>> -kto
>>
>> Matthias Klose wrote:
>>> current icedtea6 builds take a loon time (for me, 14h instead of 4h,
>>> including
>>> running the jtreg harness). My last build from 2008-06-05 still takes
>>> 4h. Andrew
>>> reported a similiar problem on irc. The current repository is fixed,
>>> in that it
>>> doesn't build a debug jdk for the stage2 build, but I still see the much
>>> increased build times (e.g. building the rt.jar during the image
>>> install takes
>>> more than cpu 120min) on an Athlon64 4400+. Any suggestions what could
>>> be the
>>> cause for this? This seems to be consistent across used GCC versions and
>>> architectures.
>>>
>>>   Matthias
>