[fpc-devel] make -j for windows, number of cores?

Marco van de Voort marcov at stack.nl
Mon Mar 17 10:36:04 CET 2014

In our previous episode, Reinier Olislagers said:
> > No. Even not on Windows. You need the number of physical cores, not logical
> > ones.  This will return the duplicate number of cores on systems with
> > hyperthreading. (I tested on my system and indeed, 8 instead of 4)
> Do you see a performance dropoff or instability/crashes... or both when
> increasing the job number past the amount of physical cores?

IIRC yes, 5 is still increasing, 6 is lower than 4 or 5. If I boot it up in
windows, I'll retest.

The point was more that the autodetection is IMHO still too immature to
enable by default.

But those are SSD based values. Increased disk seeking might make it worse
on HDDs.

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