On Mon, Nov 13, 2017 at 06:40:01PM -0600, Bruce Dubbs wrote:
> BLFS Trac via blfs-book wrote:
> > #10026: firefox-57.0
> > -------------------------+-------------------
> > Reporter: ken@… | Owner: ken@…
> >
> > The down side is that it requires clang the build becomes significantly
> > bigger(about 0.8GB) and slower. I'm still working through updating my
> > current systems, but at the moment the build SBU figures are somewhat more
> > variable than I had expected, probably 18 to 22 SBU for a "typical" 4 core
> > machine. But on one box which only has 4GB RAM less whatever its intel
> > video uses, the build took 33 SBU on an
> > otherwise idle system not running Xorg. I know that non-stylo builds on
> > this box swap when linking (in an Xorg desktop), I suspect the increased
> > use of swap is what took the time.
> >
>
> LOL. It seems that 8G is becoming the minimum for building graphical
> browsers. If I use all cores for chromium, I exceed that.
>
> -- Bruce
>
Actually, I don't think swap _is_ the main problem. I've just
finished updating its BLFS-8.0 system to ff57.0, it has 3.75GB of
real memory, and I watched the end of the build in top: 21MiB in
swap by that stage (building on one tty, fixing a script then using
top on another) and the reported resident size of ld maxed out at
3.604g and no extra swap got used. But that build too took a long
time, 34 SBU (1h15). This is my SandyBridge i3, the AMD Phenom
which I bought at the same time is much faster for this (18SBU,
46m), the Kaveri is slow (21SBU, 57m), and now I've updated the 8.1
haswell with only 4 cores online (25 SBU, less than 41m).
These are all with the patch for system graphite2 and harfbuzz, but
in build tests over the weekend it made only a minimal difference to
the time and space
I haven't paid that much attention to the timings for qt and
qtwebengine (I build them on all current desktops, but usually only
on one at a time, unlike mass updatyes). And for LO I build
differwnt languages on different boxes. But beyond those I don't
think I've ever noticed a lot of variation against the book's SBUs.
Puzzled.
ĸen
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