On Sun, Sep 6, 2015 at 3:04 PM, Richard <strata_ran...@hotmail.com> wrote:

> IIRC, this was previously discussed on the mailing list (and bugzilla) and
> the cairo library was identified as a culprit/accessory to the lag -- as
> some users reported downgrading to a previous libcairo fixes the ruler lag.
> However, it also appears to have been properly fixed as of mid-August:
> https://bugzilla.gnome.org/show_bug.cgi?id=736411#c39
> <https://bugzilla.gnome.org/show_bug.cgi?id=736411>

Thanks Richard, but it seems all OK are to windows... on my linux box the
problem is resolved only without rulers.

I work only on linux, and in this box I've two GIMP, the stable 2.8.14
(otto ppa) and and the 2.9 devel (last git master). My box is ubuntu gnome
14.04.2 - 64-bit. Memory 8Gb, Intel® Core™ i5-3570K CPU @ 3.40GHz × 4,
Gallium 0.4 on AMD CAICOS.

The 2.9 first of the patch of Michael Henning in August 11, was working
well with the rulers.
The 2.8.14 stable - ppa otto, is working well.

git log on my 2.9 git master >

commit 72617e42b426e6788c075539a20df7365d2cf102
Author: Michael Henning <dra...@darkrefraction.com>
Date:   Tue Aug 11 16:20:59 2015 -0400

    Bug 736411 - Ruler updates cause slowdown when painting

    We now avoid drawing rulers in the position property setter and use
    gtk's region invalidation instead. Previously, we were basically
    redrawing the ruler inside the mouse event handler, which is pure evil.

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