Re: gnome-terminal awfully slow. :-(

[Sriram Ramkrishna <sri aracnet com>]

Good point.  I ran it again and indeed I have 13.51 for xterm and
13.21 for gnome-terminal

On Tue, Feb 11, 2003 at 03:51:49PM -0800, Shahms King wrote:
> On Tue, 2003-02-11 at 15:00, Vlad Berditchevskiy wrote:
> > Jason Tackaberry <tack auc ca> writes:
> > 
> > >> slower on text output than in Gnome 2.0.x. :-( The slowness is even
> > >> noticable by just moving the terminal window around the desktop. Not
> > >> only the terminal text is slow, but also the menu. Other gnome 2.2
> > > 
> > > My hunch is you're using transparent gnome-terminal.
> > 
> > No, I don't. Just a solid black background. I found an explanation of my
> > problem in another thread (IIRC it was some redhat mailing list). The
> > slowness is due to the fact that the new gnome-terminal is linked
> > against libvte instead of libzvt by default, and vte seems to be much
> > slower.
> > 
> > The difference is tremendous. For example, if I execute "ls -lR
> > /usr/share" I get the following results:
> > 
> > gnome-terminal-2.2.1: about 1 minute 30 seconds
> > multi-gnome-terminal: about 3.5 seconds
> > xterm: about 3 seconds
> 
> Yes, VTE is slower than ZVT, but I seriously doubt it is solely
> responsible for this. Additionally, I think you'd be hard pressed to
> find a gnome-terminal compiled with zvt at this point.  Which terminal
> did you run ls -lR in first? Remember that the kernel caches reads and
> that makes a *serious* difference. Running:
> 
> time ls -lR /usr/share > /dev/null (testing only ls -lR, irrespective of
> terminal speed) Gives a rather significant difference between the first
> run and any subsequent runs. (On my machine it's a difference of 15 or
> more seconds to ~1 second)
> 
> Output from xterm and gnome-terminal (2.0.2 vte) and gnome-terminal
> (2.1.4 vte) (2nd run on each terminal, after piping output to /dev/null
> to try and get similarly cached data for each terminal):
> Note: I do not have the NVidia drivers, but am running CVS XFree86
> 
> xterm:
> real    1m5.519s
> user    0m1.795s
> sys     0m0.736s
> 
> g-t-2.0:
> real    1m7.472s
> user    0m1.842s
> sys     0m0.797s
> 
> g-t-2.1.4:
> real    1m6.678s
> user    0m1.813s
> sys     0m0.813s
> 
> As you can see, somewhat surprisingly (I thought VTE was slow), these
> numbers are all quite similar.  Additionally, given that the cached
> speed of an ls -lR /usr/share piped to /dev/null is about 2 seconds, 3
> seconds is nearly unbelievable unless 1) you minimized the window or
> switched to another workspace (or possible just obscured it in someway)
> or 2) ls didn't output everything it should have.
> 
> -- 
> Shahms King <shahms shahms com>
> 
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