RFR: 8371164: ArrayList.addAll() optimizations

[Pavel Rappo]

On Mon, 3 Nov 2025 21:38:49 GMT, jengebr <duke at openjdk.org> wrote:

> > A drive-by observation: this PR adds benchmarks, but does not seem to add tests.
> 
> Thank you - these methods are already covered by various existing tests, but for the most part that's indirect. Are direct ones in order?

There needs to be some proof that this functionality is covered. If you could list existing tests that exercise the ArrayList.addAll(ArrayList) and Collections.singleton().toArray() methods, we could simply add this bug number to them.

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

PR Comment: https://git.openjdk.org/jdk/pull/28116#issuecomment-3482739520