Re: Using LTO for Fedora package builds

wrote:

On Mon, Feb 26, 2018 at 05:24:28AM +0100, Kevin Kofler wrote: > Zbigniew Jędrzejewski-Szmek wrote: > > But size is easy: > > $ du -s /var/tmp/inst-O* > > 74428 /var/tmp/inst-O3 > > 56136 /var/tmp/inst-O3-lto > > 61992 /var/tmp/inst-Os > > 43572 /var/tmp/inst-Os-lto > > The current default is -O2, not -O3, though. Heh, I'm a bit surprised: 74428 /var/tmp/inst-O3 56136 /var/tmp/inst-O3-lto 61992 /var/tmp/inst-Os 43572 /var/tmp/inst-Os-lto 71268 /var/tmp/inst-O2 50276 /var/tmp/inst-O2-lto 47928 /var/tmp/inst-O0 32688 /var/tmp/inst-O0-lto So... I'd say that lto *does* give a measure benefit. (Note, it's all unstripped.)