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Date: Sat, 17 Dec 2016 22:59:05 +1100 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Stefan Bethke <stb@lassitu.de>
cc: =?ISO-8859-1?Q?Fernando_Herrero_Carr=F3n?= <elferdo@gmail.com>,
 freebsd-stable <freebsd-stable@freebsd.org>,
 Slawa Olhovchenkov <slw@zxy.spb.ru>
Subject: Re: Upgrading boot from GPT(BIOS) to GPT(UEFI)
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On Sat, 17 Dec 2016 10:49:48 +0100, Stefan Bethke wrote:
 > > Am 17.12.2016 um 07:12 schrieb Ian Smith <smithi@nimnet.asn.au>:
 > > 
 > > On Fri, 16 Dec 2016 18:08:34 +0100, Fernando Herrero Carrón wrote:
 > >> My only reason for wanting to boot with UEFI is faster boot, 
 > >> everything is working fine otherwise.
 > > 
 > > I'm skeptical that UEFI boot would be any or noticeably faster than via 
 > > BIOS, but am interested in hearing of any experiences regarding that.
 > 
 > In a very quick test with VirtualBox with 10.3-Release, ZFS, booting 
 > with BIOS and autoboot_delay=0, it takes 15 seconds to display 
 > ˙˙Booting˙˙˙˙.
 > 
 > With 11.0-R and BIOS it takes about 12.
 > 
 > With 11.0-R and EFI enabled, it takes less than 3 seconds.
 > 
 > On real hardware other factors will likely diminish the difference.

Thanks for that, Stefan.  I only have older kit here, so was curious.

And Slawa Olhovchenkov wrote:

 > Some BIOS start with very long try UEFI boot atempt and try legacy
 > boot only all of that fails.
 >
 > I.e. this is not speedup FreeBSD boot, this is speedup _start_ of
 > FreeBSD boot for some BIOS.

That makes good sense to me.

cheers, Ian