On 08/04/17 01:06, Terry Barnaby wrote:
Just an observation and to discuss the slow booting of
On a laptop I have, a Thinkpad T410, i5 4 core 2.6GHz, 4G RAM, Spinning
1 TByte 7200rpm disk (110 MBytes/s sequential reed speed) I get the
following rough figures:
Windows7 to login screen: 24s
Windows7 from login screen to desktop: 10s
Windows7 overall: 34s
Fedora25/KDE to login screen: 50s (1:46 when updatedb runs)
Fedora25/KDE from login screen to desktop: 50s
Fedora25/KDE overall: 1:40 (-> 2:36 when updatedb is running)
I get similar but slightly faster speeds on desktop i5 systems, again
with spinning disks. SSD systems I have are faster (It does seem to be
disk bound) but still not that quick.
It is starting to get noticeable/an issue these days and getting
embarrassing when going to meetings with a Linux Laptop !
Once Fedora25/KDE its running it is quite snappy, unless there is disk
activity going on in the background when some things can lockup awaiting
disk (why should desktop code be so disk reliant ?)
I know disk readahead is no longer present which doesn't help, but it
does seem that the code in general, and KDE/Plasma specifically appears
to be getting a bit bloated and disk bound. Of the 50s to login screen
23s appears to be due to sddm (not sure on that). Could this be due to
more extensive usage of things like QtQuick (QtSlow !) ?
Ok, I can buy a SSD, disable updatedb (but why does this start during
boot quite often ?), change to a different desktop and/or suspend to
mem/disk but really the system shouldn't be this slow and probably power
consuming. Oh for the days of KDE 3 :)
(An ancient Thinkpad 600E, Mobile Pentium II 363 MHz, 228 MBytes RAM
running Fedora6 and KDE 3 system takes 21 s from login screen to KDE 3
desktop (Ok Linux boot to login is a bit slow on that one at about 1:10)).
Does anyone in the know think that this performance aspect may improve
or get worse as the KDE/Plasma 5 series is developed ?
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When it comes to Windows, make sure you are comparing windows with fast
boot or cold boot. There is a big difference I have seen. I know
yesterday on a laptop. KDE live USB was a much faster boot than Windows
from it's internal drive.
Now the login is another issue. I find KDE login is slow on my older
machines, slower than it used to be.
Startup finished in 2.072s (kernel) + 14.811s (initrd) + 40.174s
(userspace) = 57.059s
AMD FX(tm)-8320 Eight-Core Processor
Another machine F24
Startup finished in 1min 10.623s (firmware) + 5.244s (loader) + 9.764s
(kernel) + 35.582s (initrd) + 13.769s (userspace) = 2min 14.982s
Intel(R) Core(TM) i7-5930K CPU @ 3.50GHz
This machine motherboard is slow to boot as it does some checks when
powering on and I don't know if that is part of the startup timing. I
will have to check with a watch one of these days.
Both machines have bios passwords and system encryption passwords.
From what I have heard, from cold boot, Windows 10 is slower on this
machine and runs slower.
Still, the time I press enter to login till KDE desktop is ready to use
seems to be slower.