Le 2014-04-21, Bram Moolenaar <[email protected]> a écrit :
> > 
> > Yet I wonder if the current hack with ASCII characters is really useful.
> > Is there any performance test to check if a simpler behaviour wouldn't be
> > suitable, at least for modern desktop installations?
> > As the code comment mentions spaces, maybe it should be restricted to
> > blank lines?
> 
> This stuff is too complicated to guess what works best.
> Any changes need to be tested with various GTK versions and with
> different display drivers to check the speed.  Even modern desktops
> sometimes have slow graphics (using generic drivers instead of
> proprietary ones).
> 
> Note the remark about drawing the cursor, check that the test doesn't
> change when moving the cursor over it.

It was clear this stuff was complicated, that's why I opted for a minimal
change. It didn't have any visible effect on my desktop, and now I can
use some fonts that were mangled in gvim before (mangled on lines with no
non-ASCII chars!).

> Perhaps we should add an option to disable the optimization?

In my humble opinion, removing the current optimization hack should be a
long-term goal. The optimization adds complexity to the display code,
with various side-effects. And as Pango and such have evolved, I don't
know if there is still a need for a distinct display routine on ASCII
lines.

Thanks
--
François

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