Ubuntu 16.10 Doesn't Change Much With Performance, Clear Linux Still Leads In Most Tests

[SaucyJack]

unapproved

[caligula]

I don't know but I recompile all the software on my main system with -Ofast -march=native and I don't remember having a weird crash or something like this. -O3 may have been crashy two decades ago but nowadays it works really well.

Stop spreading the FUD and try it yourself. Many games use -O3 because the maximum speed is good. Many programs work and many programs don't give a crap if the floats are computed a bit differently. -O3 should be totally safe and bug reports should be made if some basic software doing integer computation fails.

[cj.wijtmans]

Stop spreading the FUD and try it yourself. Many games use -O3 because the maximum speed is good. Many programs work and many programs don't give a crap if the floats are computed a bit differently. -O3 should be totally safe and bug reports should be made if some basic software doing integer computation fails.

building dev-scheme/guile-2.0.12-r1 fails for me with `-march=native -Ofast -pipe`.

[SaucyJack]

building dev-scheme/guile-2.0.12-r1 fails for me with `-march=native -Ofast -pipe`.

Still spreading FUD eh? Would help if you didnt use Ofast you know. The discussion was about O3.

[arjan_intel]

Still spreading FUD eh? Would help if you didnt use Ofast you know. The discussion was about O3.

FWIW in Clear Linux we have a per package attribute that marks the package "performance sensitive" "size sensitive' or "normal", and 3 different sets of CFLAGS are used between these based on this attribute.

these map largely to O3 / Os / O2 but also some other more minor flags like LTO (for performance sensitive)

[cj.wijtmans]

Still spreading FUD eh? Would help if you didnt use Ofast you know. The discussion was about O3.

Ofast implies O3. I can try again with just O3 but i amguessing the same result.

[cj.wijtmans]

FWIW in Clear Linux we have a per package attribute that marks the package "performance sensitive" "size sensitive' or "normal", and 3 different sets of CFLAGS are used between these based on this attribute.

these map largely to O3 / Os / O2 but also some other more minor flags like LTO (for performance sensitive)

Could this be contributed to gentoo?