RFR: 8197991: Selecting many items in a TableView is very slow [v3]

[yosbits]

On Fri, 26 Nov 2021 19:44:14 GMT, Abhinay Agarwal <duke at openjdk.java.net> wrote:

>> tests/manual/controls/SelectTableViewTest.java line 19:
>> 
>>> 17:     //  final int ROW_COUNT = 80_000;
>>> 18:     //  final int ROW_COUNT = 50_000;
>>> 19:     //  final int ROW_COUNT = 8_000;
>> 
>> The number is meaningful because it is the number of data I used to show the improvement effect in the original PR.
>> 
>> Reference value of the number of data that can be handled within 3 seconds of processing time (before-> after)
>> 
>> TableView
>> 
>> selectAll: 8_000-> 700_000
>> selectRange: 7_000-> 50_000
>> 
>> 
>> 
>> 
>> 
>> ``` Java
>> public class SelectTableViewTest extends Application {
>> 
>> 	final int ROW_COUNT = 700_000;
>> //	final int ROW_COUNT = 80_000;
>> //	final int ROW_COUNT = 50_000;
>> //	final int ROW_COUNT = 8_000;
>> 	final int COL_COUNT = 3;
>
> I reduced ROW_COUNT from 700_000 to 70_000 as the tests were taking a few seconds to run on my machine. I have reverted these now. Nevertheless, time taken to run a test have a number of variables. Depending on the machine the tests are run, it may not necessarily always take 3 seconds :)

The processing time changes for each operation.
You probably adapted to the slow operation (selectRange).
You can comment it out, but 700_000 is for selectAll. Although it depends on the device, the environment I have confirmed is his MacBook Pro in 2016.

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PR: https://git.openjdk.java.net/jfx/pull/673