[coreboot] Thoughts or conclusions on coreboot and link time optimization (LTO)?
paulepanter at users.sourceforge.net
Thu Apr 24 23:56:39 CEST 2014
Dear coreboot folks,
Am Donnerstag, den 24.04.2014, 23:39 +0200 schrieb Paul Menzel:
> in #coreboot on <irc.freenode.net> Stefan mentioned that link time
> optimization (LTO)  might yield some speed improvements for coreboot
> as the resulting firmware image might be smaller and therefore it takes
> less time to read it from flash.
> As LTO has been greatly improved in GCC 4.9.0 and is all over the news,
> has somebody already experimented with LTO or created patches or tools
> for testing?
> Is somebody able to share conclusions already? That’d be very
looking further in April and May 2011 Scott Duplichan even sent a patch
to add an option to enable LTO , but unfortunately it was not
Back then on AMD Persimmon with SeaBIOS as payload the boot time was
reduced from 690 ms to 640 ms. (Fun fact: UEFI firmware took 10 s on
>  http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
> (search for `lto`)
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