[Pkg-xfce-devel] Bug#453266: Bug#453266: Bug#453266: xfce4-terminal: text displays slowly and hogs CPU in some tabs and instances

[A. Costa]

On Sun, 02 Dec 2007 10:47:19 +0100
Yves-Alexis Perez <corsac at corsac.net> wrote:

> > ...there seems to be two speeds or "gears", low gear 'seq 10000'
> > 6s (=~1800per/sec), high gear 999000 in 19-6=13s (=~.77000p/s).
> 
> Note that it may have to do with the number of lines you keep in
> buffer (see terminal preferences). When you first run a command wich
> outputs a lot, the terminal will have to allocate the memory. Then
> it'll reuse the memory already allocated, so it'll be faster.

My buffer is set to 1000 lines at present... which matches up with the
'seq 1000'.  But if it's a one-time memory allocation delay, then
shouldn't the second run of 'seq' should be faster?  It wasn't; the
"two-gear" effect was visible for every run.

Yet tonight, I'm unable to reproduce the "two-gear" effect.  Such a
"heisenbug".

> ...Yet, I don't think it's a bug in terminal wich prevents you to use
> it. This kind of test just stress it a lot but any terminal will be
> more cpu-intensive when a lot of text is outputed fastly.

Well when first I reported the bug the terminal speed was really slow;
these stress tests were just attempts at reproducing that state.
For sanity's sake I'll take a break for now, maybe some abler user will
bump into it.