unimpressive buildworld time

Chuck Robey chuckr at chuckr.org
Thu Nov 15 20:08:57 PST 2007

Jonathan Horne wrote:
> On Wednesday 14 November 2007 03:45:07 pm Aryeh M. Friedman wrote:
>>> Impressive ;-) My main machine (with an Athlon XP @ 2GHz) takes ~2
>>> hours to build kernel and world (I use a script to do that). My
>>> other box is running -CURRENT and takes ~11 hours to build kernel
>>> and world (Celeron 500...).
>>> Just to supply some numbers that "go the other direction" :-)
>> With no -j and running gnome and doing other things in the foreground
>> (watching a avi) 1 hr 3 mins on a e6850 w/ 4 gig (amd64)
> p4 540 3.2GHz, 1GB ram:
> --------------------------------------------------------------
>>>> World build completed on Thu Nov 15 19:15:05 CST 2007
> --------------------------------------------------------------
> real    63m8.635s
> user    102m44.096s
> sys     10m44.889s
> [root at athena /usr/src]#

I have a quad core machine, and I found that (after a bit of checking) 
that about 95% of my improvements could be cotten with a -j4 setting. 
It did keep on improving, but only very little, up to  -j8.

AT -j8 it was about 18 minutes.  I do have more accurate numbers, if 
folks are curious.  I did buildworlds, so no kernel built, and the 
environment was with all the files from a previous build in place.

> heh, i have appropriately renamed the thread.  :)  with -j 8
> cheers,

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