Messages in this thread | | | Date | Sun, 17 Mar 2002 09:18:25 +0100 (CET) | From | Mike Galbraith <> | Subject | Re: [Lse-tech] 7.52 second kernel compile |
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On 16 Mar 2002, Daniel Egger wrote:
> Am Sam, 2002-03-16 um 18.37 schrieb Martin J. Bligh: > > > BTW - the other tip that was in the big book of whizzy kernel > > compiles was to set gcc to use -pipe ... you might want to try > > that. > > Interestingly -pipe doesn't give any measurable performance increases or > even leads to a minor decrease in compile speed in my latest tests on > bigger projects like the linux kernel or GIMP. I suspect that's because > of the caching nature of nowadays systems: the temporary products are > cached in memory and likely not to never end on a drive because they're > read and removed before the point the filesystem decides to physically > write the data. > > I also benchmarked tmpfs mounts and it demonstrated - to my surprise - > small advantages slightly above the noise range; I suspect this is due > to the way it handles files in memory.
Yes. Last time I tested, -pipe was _always_ a loser, and writing to swap was measurably faster than writing to fs.
-Mike
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