On Fri, 27 Jan 2023 14:28:08 GMT, Alan Bateman <al...@openjdk.org> wrote:

> I skimmed through the latest update. I see you've considered the possibility 
> of a Matryoshka doll showing up but the optimization is still very very 
> scary. I think it would require an audit of every API in java.base that 
> potentially wraps a collection. It might be better to focus on a few specific 
> cases that can be proven to be safe.

It is good to limit the trusted collection to a set of known collections. I am 
thinking about the best way to implement it. I hope that the impact on 
performance will be as small as possible.

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PR: https://git.openjdk.org/jdk/pull/12212

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