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Date:   Sun, 10 May 2020 10:45:24 -0700
From:   Joe Perches <>
To:     David Laight <David.Laight@...LAB.COM>,
        Arnd Bergmann <>,
        Oleksandr Natalenko <>
Cc:     "Jason A. Donenfeld" <>,
        LKML <>, X86 ML <>,
        Andrew Morton <>
Subject: Re: [PATCH] Kconfig: default to CC_OPTIMIZE_FOR_PERFORMANCE_O3 for
 gcc >= 10

On Sun, 2020-05-10 at 12:47 +0000, David Laight wrote:
> From: Joe Perches
> > Sent: 08 May 2020 16:06
> > On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > > Personally, I'm more interested in improving compile speed of the kernel
> > 
> > Any opinion on precompiled header support?
> When ever I've been anywhere near it it is always a disaster.

A disaster? Why?

For a large commercial c only project, it worked well
by reducing a combined multi-include file, similar to
kernel.h here, to a single file.

That was before SSDs though and the file open times
might have been rather larger then.

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