Bug#408759: gnome-terminal: terminal is slow

[Sven Arvidsson]

On Tue, 2007-03-20 at 11:44 +1100, Paul Szabo wrote:
> Upgraded to sarge 3.1r5: no change. Then upgraded to sid, now using xorg
> (not xfree86) and changed driver from vesa to i810 (as xorg vesa could not
> do 1280x1024 at 60Hz)

Hi,

Thanks for upgrading to sid, sarge only gets security updates, so
there's no real surprise if you're not seeing any improvement in 3.1r5.

> , and re-ran my test: depending on terminal size (80x24
> or full screen) my Celeron2GHz takes between 28 and 53 seconds for
>   perl -e '$|=1; foreach $x (1..500) { print "x" foreach(1..$x); print " $x\n" }'
> and a mere 0.7 or 1 second for
>   perl -e '$|=0; foreach $x (1..500) { print "x" foreach(1..$x); print " $x\n" }'
> 
> Seems not fixed at all.

I wonder if this is a good benchmark at all. 

For the first test, repeated tests give me results between 0.2 and 6
seconds in gnome-terminal. In xterm the results are much worse, between
0.5 and 35 seconds.

The second test is usually between 0.2 and 0.3 seconds in gnome-terminal
and around 0.4 in xterm.

Both terminals are running in standard size, 80x24.

I don't know if you follow GNOME development, but performance in
gnome-terminal was greatly increased in the 2.14 release.
http://www.gnome.org/start/2.14/notes/en/rnusers.html

A bigger issue, I think, is what fonts you are using, this can make a
huge difference, as can be seen in these notes on gnome-terminal
optimisation.  
http://mces.blogspot.com/2005/10/gnome-terminal-performance.html

-- 
Cheers,
Sven Arvidsson
http://www.whiz.se
PGP Key ID 760BDD22
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