Re: [ jEdit-devel ] Disabling FastRepaintManager

[Matthieu C. <cho...@gm...>]

On Sat, Aug 30, 2008 at 11:52 AM, Kazutoshi Satoda
<k_s...@f2...> wrote:
> Matthieu Casanova wrote:
>>
>> Hi, I'm not at homeand cannot test your patch but it could be and idea
>> to test, a better solution would be to add an option (maybe in Debug
>> class), se we can enable and disableit easily and it will be easy to
>> do comparison.
>> would it be possible
>
> That's a good idea to make speed comparison. Done in r13454. Thanks.
>
> But I still want to drop FastRepaintManager completely, because I found
> that it's not fast at all, at least in my box.
>
> --
> k_satoda
>

Hi, it seems I'm unable to reproduce your speedup here
on Linux, using Sun's JDK 1.6.0_07 I started jEdit like this

jedit -nosettings

I disable caret blinking
And in the build.xml of jEdit I click on the scrollbar to scroll down
once and one time up
I have this with FastRepaintManager

00:54:20 [AWT-EventQueue-0] [debug] TextAreaPainter: repainting 3
lines took 17664/239520/22906 ns


And this without

00:55:14 [AWT-EventQueue-0] [debug] TextAreaPainter: repainting 25
lines took 1833/1386457 ns


I also tried to go to the end of the buffer here are the results
01:03:49 [AWT-EventQueue-0] [debug] TextAreaPainter: repainting 25
lines took 6850/2007007/31756 ns
01:04:59 [AWT-EventQueue-0] [debug] TextAreaPainter: repainting 25
lines took 1813/1555419 ns


So when only scrolling 3 lines it is much faster with the
FastRepaintManager, but little slower when repainting all.
But I think in most case a few lines are repainted so the
FastRepaintManager seems useful to me


 I use a E6600 (2.4 Ghz), maybe the difference is on the processor
speed, change something ...
I think it should remain as an option until we find why I have this
big difference with your test

Matthieu