On Thu, 3 Sep 2020 07:44:55 GMT, yosbits
<github.com+7517141+yos...@openjdk.org> wrote:
>>>
>>>
>>> When the startup time is measured by eye, the impression changes depending
>>> on the individual difference.
>>
>> my eye is a precision instrument :) Seriously, who would do such a thingy?
>> Obviously, it must be measured, for zeroth
>> approximation doing so crudely by comparing currentMillis before/after
>> showing is good enough to "see" the tendency.
>>> The effect of runLater affects your experience.
>>
>> that's why you shouldn't do it when trying to gain insight into timing
>> issues ;)
>>
>>>
>>> However, I succeeded in further improving performance by eliminating
>>> another bottleneck in TreeTableView. Of course, it
>>> also includes improvements in startup time.
>>
>> cool :)
>
> Column virtualization causes shortness of breath when scrolling a large
> stroke horizontally.
> This does not happen when stroking on the scrollbar. Looks like a potential
> problem with VirtualFlow.
>
> If you are worried about shortness of breath, the following code will help
> reduce the problem.
>
>
> Java
> 　private static final int OVERLAP_MARGIN = 500;
>
> private static boolean isOverlap(double start, double end, double start2,
> double end2){
> start = Math.max(start-OVERLAP_MARGIN, start2);
> end = Math.min(end+OVERLAP_MARGIN, end2);
> return (start<=end2 && end >= start2);
> }
@yososs Per [this
message](https://mail.openjdk.java.net/pipermail/openjfx-dev/2020-September/027534.html)
on the
openjfx-dev mailing list, I have closed
[JDK-8185886](https://bugs.openjdk.java.net/browse/JDK-8185886) as a duplicate,
and suggested another existing JBS issue for this PR to use. Please change the
title to:
8185887: TableRowSkinBase fails to correctly virtualize cells in horizontal
direction
-------------
PR: https://git.openjdk.java.net/jfx/pull/125
