[PATCH 0/6] Some vfprintf refactoring

[Florian Weimer]

On 03/05/2015 09:53 PM, Florian Weimer wrote:

> GCC will inline the new printf_positional function because it is called
> in just one place, so any differences should be just random noise by
> slightly different optimizer choices.

I forgot to mention in my message about the performance impact that this
is not actually true: GCC will not inline printf_positional because of
the way it uses label addresses/computed gotos.  But as explained in the
other message, this does not make the code worse (with GCC 4.9 at least):

<https://sourceware.org/ml/libc-alpha/2015-03/msg00266.html>

-- 
Florian Weimer / Red Hat Product Security