RFR: 8185886: Improve scrolling performance of TableView and TreeTableView [v3]

[yosbits]

On Tue, 1 Sep 2020 14:12:15 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

>> Since there was a problem that the cell was not updated when the window was maximized, I added a fix to
>> TreeTableViewSkin.java.
>> Added test code (BigTreeTableViewTest) for TreeTableView to the first post.
>> 
>> @kleopatra
>> Does the test code I added (BigTreeTableViewTest.java) also have side effects?
>
>> 
>> 
>> Since there was a problem that the cell was not updated when the window was maximized, I added a fix to
>> TreeTableViewSkin.java.
> 
> that's just the added listener to hbar properties (same as in TableViewSkin), or anything else changed?
> 
>> Added test code (BigTreeTableViewTest) for TreeTableView to the first post.
>> 
>> @kleopatra
>> Does the test code I added (BigTreeTableViewTest.java) also have side effects?
> 
> yeah, but why do you ask me - you could easily see for yourself :) And don't understand why you wrap the hierarchy
> setup in runlater (which smears a bit over the delay by filling the treeTable content at an unspecific time "later")

When the startup time is measured by eye, the impression changes depending on the individual difference.
The effect of runLater affects your experience.

However, I succeeded in further improving performance by eliminating another bottleneck in TreeTableView. Of course, it
also includes improvements in startup time.

I plan to commit at a later date.

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PR: https://git.openjdk.java.net/jfx/pull/125