Re: [PATCH] x86: Align jump targets to 1 byte boundaries

From: Linus Torvalds
Date: Mon Apr 13 2015 - 14:31:57 EST

On Mon, Apr 13, 2015 at 10:26 AM, Markus Trippelsdorf
<markus@xxxxxxxxxxxxxxx> wrote:
> I must have made a measurement mistake above, because the actual code
> size savings are roughly 5%:

Can you check against the -fno-guess-branch-probability output?

Does lto (without pgo) perhaps end up undoing a lot of the random
"branch out and back" noise?

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