Re: FT Performance Regression?

[Jamie Dale]

>  This is fixed in 2.10.1.
Good to know. Once again, not called out in the upgrade notes.

> What is the performance issue?
The lack of clamping means that gray_convert_glyph_inner is called
hundreds of times more than it used to be. The may not be noticed on a PC
with a decent CPU, but on a games console with a potato CPU it results in
100+ms hitches.

Seriously, FT_Outline_Render is 10x slower is FreeType 2.10 than 2.6 with
equivalent input. It's probably not noticeable to you unless you're doing
real-time applications, but that is a *fantastically* bad regression for
anyone using FreeType for games.

-Jamie.

On Sun, 27 Oct 2019 at 20:43, Alexei Podtelezhnikov <address@hidden>
wrote:

>
> > FreeType 2.10 we found that if you use FT_RASTER_FLAG_DIRECT you now
> *must* also use FT_RASTER_FLAG_CLIP and specify a clip_box otherwise
> FreeType will crash.
>
> This is fixed in 2.10.1. What is the performance issue?