On Mon, 21 Sep 2020 10:45:49 GMT, Jeanette Winzenburg <faste...@openjdk.org> 
wrote:

>> Since the purpose of this issue is performance tuning,
>> Rewriting with removeIf has a different purpose.
>> This is the same as the original code.
>> 
>> The iteration order is reversed because index movement does not occur during 
>> deletion. This is the same as the original
>> code.
>
> wondering why the implementation with the BitSet was choosen at all? 
> Certainly feels like a detour, so what are the
> corner cases that I'm too blind to see?

I can't answer(, but my intuition is a pattern of lack of skill).
Officially, I don't know because the history is interrupted.

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

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