[Xfce4-commits] <thunar:master> Reduce D-Bus noise by grouping thumbnail requests in 100ms time slots.
stephan at xfce.org
Fri Sep 4 10:36:34 CEST 2009
On Fri, Sep 4, 2009 at 3:22 AM, Jannis Pohlmann<jannis at xfce.org> wrote:
> Updating branch refs/heads/master
> to 4911ff1ed0f3fe2d7299a35cb72f0d6dcffcac79 (commit)
> from e99cdb4cfae6392f15dc677c3e1c3b0e892a789a (commit)
> commit 4911ff1ed0f3fe2d7299a35cb72f0d6dcffcac79
> Author: Jannis Pohlmann <jannis at xfce.org>
> Date: Fri Sep 4 03:11:05 2009 +0200
> Reduce D-Bus noise by grouping thumbnail requests in 100ms time slots.
> Just like the rest of ThunarThumbnailer, this code is somewhat scary.
> ThunarThumbnailer now queues individual thumbnail request in a wait
> queue which is triggered at most every 100ms. All requests made in this
> time slot are grouped and sent out as *one* request.
> For each time slot, the local optimization is 3+n D-Bus messages (1
> request, 1 started signal, 1 finished signal and n ready signals) as
> compared to 4*n messages we had before (1 request and 1 started,
> finished and ready signal for each individual file).
> Of course this calculation is naive. In theory our users scroll up and
> down like crazy, sometimes slower, sometimes faster, everyeone using
> different Thunar window and icon sizes.
> As a result the grouped requests are sometimes very small and sometimes
> very large. It's worth noting that this optimization performs better,
> the more files are visible in the window and the faster a user scrolls
> (as this means that more files are made visible within 100ms and thus,
> the size of group requests grows). So I guess we're good.
Jannis, that's a beautiful solution :-)
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