On 11/2/18 10:20 AM, William F Pokorny wrote:

> 
> Interesting. I see too -fstack-protector-strong which off the top of my
> head the default compile does not use. 



> Oh, and there is no -march=native
> so expect quite a few other optimizations not done. -D_FORTIFY_SOURCE=2
> added too.

-march=native is interesting.  "Up to 60% performance increase" [1].
Well that's a hell of a thing if true.  But, you have to know which
Intel arch you are compiling for.  Skylake/Haswell/Cannonlake/etc are
all different.

If that is true, it's too bad there isn't a switch in packages based on
arch.
(This took me down a rabbit hole lamenting that debian/Ubuntu is stuck
on "Hey, it runs on any x64 hardware, even AMD".
Which made me think of Jr; "If I was still running Slackware, I'd have
built my own Intel Clear Linux kernel with clang" ;)  )


[1]
https://www.phoronix.com/scan.php?page=news_item&px=GCC-8-march-native-Skylake
-- 
dik
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