Re: GTK 2.2.4 with Pango 1.2.5 -- performance depends on language

[Behdad Esfahbod <behdad behdad org>]

On Fri, 2006-09-22 at 16:19 -0400, Boncek, John wrote:
> We have a large application that can be run in many languages.  Screen
> transitions slow down noticeably in certain languages (with everything
> else the same).  In English or Chinese Simplified, a certain screen takes
> about 3 seconds to completely display (not fast but tolerable).  In
> Japanese, Arabic, Chinese Traditional, or Korean, the same screen takes
> about 5 seconds.  The performance doesn't seem related to total amount of
> text being drawn, since some of the slow languages use many fewer
> characters than English.  Nor does it seem related to font height, since
> the 2 Chineses are about the same height.  Nor does it strictly follow the
> Roman/non-Roman split, since Chinese Simplified is fast.  All text is in
> utf-8.
> 
> A search of Bugzilla turned up nothing similar.
> 
> We run on the ARM PXA270 architecture, for which there are no profiling
> tools available.  I have done extensive searching of the Web for such
> tools and all the tools I have found target other architectures (mainly
> x86).
> 
> Any suggestions on speeding up this display situation would be welcome.

The best I can suggest is to upgrade your Pango version.  1.2.5 is way
too old to talk about performance-wise.  Try with at least 1.8.x, and
preferably even more recent, like 1.14.x!

-- 
behdad
http://behdad.org/

"Commandment Three says Do Not Kill, Amendment Two says Blood Will Spill"
        -- Dan Bern, "New American Language"