The following Jira is more precisely aimed at the scrolling optimizations that were disabled for Retina:


On 1/3/14 4:04 PM, Stephen F Northover wrote:
Hi Jeff,

Please add your weight to the JIRA (indicate the hardware you are
using).  A fix for the desktop should also fix the problem on iOS.


On 2014-01-03 5:45 PM, Jeff Martin wrote:
I noticed the high-dpi problem on a high-end MacBook Pro Retina. Took
me by surprise for JavaOne demos since I usually use an external
monitor (non-retina). I ended up switching to low dpi.


On Jan 3, 2014, at 3:59 PM, Stephen F Northover
<> wrote:

Hi Tobias,

Sorry about that.

Looking at the bug, it seems to me that we have gotten to the bottom
of it.  Some iOS devices are scrolling fine while others are slower.
The difference seems to be that high dpi disables optimizations and
this causes the slowness on iOS.  The same optimizations are disabled
on the desktop, but the desktop is much faster and people don't
notice.  There was some discussion about performance in the
simulator, but we should ignore that. Performance on the device is
what matters.

iOS and Android are not currently supported platforms for JavaFX. We
are looking towards the community to step up and submit patches to
take these ports forward.  Johan Vos and others are helping with
Android.  Are you interested in working on iOS?  If so, please build
on the patches in and
take the work forward.

The first step would be to prove that we can be fast (which I think
we can if we run with the optimizations) then understand how to turn
the optimizations back on.


On 2014-01-03 3:28 PM, Tobias Bley wrote:

many months ago I reported the „poor performance on iOS“ issue
( Now 6 months later
the bug is already open and no one of Oracle answers me on Jira.

What’s up? How can we fix this important bug?


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