Re: [ jEdit-devel ] "Anti Aliased smooth text" option set to "subpixel" combined with "Fractional font metrics" enabled causes laggy scrolling (4.3pre16)

[Paul R. <pau...@gm...>]

I recently upgraded to 4.3 (final), and I discovered that this problem
resurfaced.

Scrolling large amounts of text was generally slow, and was worst with
both "subpixel" and the "fractional font metrics" options enabled.

I have discovered that if I add "-Dsun.java2d.noddraw=true" to the
jedit command line options, then the performance problems are fixed.
I get very fluid scrolling with both the above font options enabled.

Some googling has shown that some people suspect video card drivers.
For that reason I'll add that I'm using a "NVidia Quadro FX 580", with
driver version 182.67.


2009/2/24 Paul Richards <pau...@gm...>:
> Hi,
> Today I upgraded from 4.3pre15 to 4.3pre16 and I found that scrolling
> was very slow and laggy.  I noticed that it was worse when the lines
> of text being rendered were long, and so I fiddled about with some of
> the "Text Area" options.
>
>
> I have found that in 4.3pre16 the scrolling goes very laggy if the
> "Anti Aliased smooth text" option is set to "subpixel" and the
> "Fractional font metrics" option is enabled.
>
> If I change either of these options, e.g I enable fractional font
> metrics but use "standard" anti-aliasing, then the scrolling is fine
> again.  Similar if I leave the anti-aliasing on "subpixel" but disable
> fractional font metrics I again get good scrolling performance back.
>
> I am using Vista 64-bit with Java 1.6.0_12 (32-bit).
>
>
>
> --
> Paul Richards
>



-- 
Paul Richards