The Speed Factor -- Kubuntu vs. Gentoo

[Lea Gris]

Dotan Cohen a écrit :

> SVG: scalable vector graphics. If you are using a jpg gif or png
> background then this won't bite you. As for the other stuff, I'd like
> to hear more as well.

The new default background in Ubuntu is an SVG vector graphic
representing a styled heron. This perticular background impact desktop
performance somehow due to it beying heavy on CPU and memory do draw and
redraw upon window moves unless you use compiz 3D rendering engine and
effects. In this last case it just eat up memory for the entire layer.

As for the SATA problems, comments on the launchpad bug entry says it
all. You may be able to have it fixed with a custom compiled kernel bug
I hadn't tested this so, it may me more complicated to get if fixed. By
the way this one has significant impact on overall disk and application
performances.

About the atime default, this esayly fixed by editing /etc/fstab and
adding noatime to the mount options like:

/dev/sda1 UUID=bca9dde...7f8 / ext3
defaults,errors=remount-ro,noatime 0 1

By the way, this last one is not a typically userfriendly adjustment. It
require knowledge of linux filesystem options and behaviors as well as
manipulationg the option on that fstab text file.

At last, for the .xsession-errors:
Just look at the size of this file just after one hour of use.
Just look at what's inside this file (it is a plaintext log of
application talks, huge and useless debug talks you won't need unless
you are a developper.
You can even have a taste of this all useless talk by invoking the Kde
tools and programs via a shell window. This output gos stright to stderr
or even stdout. If you launch from shell it dispaly on screen. Otherwise
it is al redirected to the .xsession-errors file, thus each talk from
applications you use on desktop need consant disk write access. Do you
need this feature? Do you like performance impact with all this debug
stuffs written to disk?

I don't know how to fix this, realy this output should be turned off or
silent by default and I guess theis has to be specified at compilation.
The only thing you can do is softlink .xsession-errors to /dev/null, but
you will have to redo it at each new sessions because it gets
reset/erased uppon logout/login, or you wil need to protct the file with
proper attributes to avoid the softlink to be removed.

Regards

-- 
     Léa Gris - http://www.noiraude.net/
()   Campagne du ruban texte brut contre les courriels en HTML,
/\   contre les pièces jointes dans un format propriétaire.

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