RFR: 8371164: ArrayList.addAll() optimizations

[jengebr]

On Tue, 4 Nov 2025 12:04:40 GMT, Oli Gillespie <ogillespie at openjdk.org> wrote:

>> test/micro/org/openjdk/bench/java/util/ArrayListBulkOpsBenchmark.java line 120:
>> 
>>> 118:         ArrayList<String> result = new ArrayList<>(75);
>>> 119:         result.addAll(linkedListSource75);
>>> 120:         bh.consume(result);
>> 
>> No need for blackholes, just return the result, it has the same effect I believe.
>
> (see https://shipilev.net/jvm/anatomy-quarks/27-compiler-blackholes/#_pure_java_blackholes)

Thanks, will incorporate these changes.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28116#discussion_r2490662114