On Wed, 7 Oct 2020 12:11:12 GMT, Eric Bresie 
<github.com+370894+ebre...@openjdk.org> wrote:

>>> 
>>> 
>>> I'm preparing a change that won't break compatibility, so stay tuned.
>>> The test seems to need to be added.
>> 
>> sounds good :) Note, that I'm working on 
>> [JDK-8254040](https://bugs.openjdk.java.net/browse/JDK-8254040) which will 
>> add
>> regression tests that your change will have to pass (turned out that f.i. 
>> FilteredList also relies on the two-pass
>> approach).  Until you are done, you might consider changing the state of 
>> this to Draft.
>
> Hopefully not looking in the wrong version but:
> (1) When dealing with BitSets previously, maybe this was by design butI 
> didn’t see any usage of BitSet’s
> “clear(<index>)” to remove items from the BitSet.  Although given move to 
> remove it may be moot now. (2) If no longer
> using the BitSet, may want to remove the import for this (3) In context, 
> usage of HashSet was suggested.  I don’t
> believe HashSet is thread safe.  If using it, may want to consider 
> ConcurrentHashSet.  Although not sure if this is
> more efficient either.

I plan to push changes that remain compatible, respecting the judgment of the 
project leader, but I would like to point
out the following:

There seems to be a problem with the reproduction code as follows.

* If there are duplicate items, the unselected parts will also be deleted.
* Using selectIndices () is more advantageous in terms of performance than 
selectedItems ().

Therefore, this context should normally be avoided,
Seems like less important compatibility.

-------------

PR: https://git.openjdk.java.net/jfx/pull/305

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