> > > what about having DPB_PROPERTIES=parallel ?
> >
> > Not sure about that. Someone else who is familiar with this feature should
> > comment as to whether it should be added or not.
>
> You run a build with MAKE_JOBS=1 and one with MAKE_JOBS=2 (or better 4
> if you have the hardware) and compare the build times. If it sorta,
> kinda scales, we enable DPB_PROPERTIES=parallel.
>
> The last time I checked boost it scarled poorly enough that I thought
> enabling the parallel build wasn't worth it, but I don't remember
> the figures.
results are in...
MAKE_JOBS=1
22m44.71s real 18m7.76s user 2m43.81s system
===> Cleaning for boost-1.52.0p1
MAKE_JOBS=2
12m52.11s real 18m24.61s user 3m51.25s system
===> Cleaning for boost-1.52.0p1
MAKE_JOBS=4
8m17.98s real 19m8.27s user 6m3.54s system
===> Cleaning for boost-1.52.0p1
so yes, it does provide a "boost" :-)
this is with a
cpu0: Intel(R) Xeon(R) CPU E3-1220 V2 @ 3.10GHz, 3093.39 MHz
