[Lazarus] IDE Editor incredibly slow on newer GTK2

Martin lazarus at mfriebe.de
Sat Mar 24 22:04:43 CET 2012

On 24/03/2012 21:02, Bernd wrote:
> 2012/3/24 Martin<lazarus at mfriebe.de>:
>> Compile the SynEdit package with the following defines
>> SynDebug
>> SynCaretDebug
>> VerboseSynEditInvalidate
>> SynCheckPaintLock
>> and get a logfile.
>> Please also try if switching the overview gutter (right hand site)
>> (Options/Editor/Display) makes a different.  IIRC some WS does unnecessary
>> invalidates (but not as bad as you described)
>> Or switch off highlight of all occurrences of the word under caret
>> (obviously that can lead to a full invalidate, but usually it has a time
>> delay, so it does not affect editing)
> I will try these defines and make the log (tomorrow). The right
> overview gutter (and also the left gutter) does not have any notable
> effect.
> Meanwhile I have made another interesting discovery: It only happens
> when there is *no* horizontal scrollbar. As soon as the horizontal
> scroller appears the CPU usage of the X server immediately drops from
> 60% to 20%, total CPU usage well below 100% and the caret is moving
> smoothly again and no notable delay. This is why I noticed it only
> today and not 2 weeks ago: I started a new project today and the unit
> where I spent most of my time today does not have long enough lines
> yet to have a horizontal scrollbar.

How about, if there is a horizontal scrollbar, but not a vertical?

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