On Wed, 3 Jan 2024 19:52:34 GMT, Joshua Cao <[email protected]> wrote:
>> test/micro/org/openjdk/bench/java/util/concurrent/Maps.java line 122:
>>
>>> 120: public void testCopyConstructor() {
>>> 121: ConcurrentHashMap<Integer, Integer> clone = new
>>> ConcurrentHashMap<>(staticMap);
>>> 122: dummy = clone;
>>
>> Is this for preventing dead-code elimination? If so, just do:
>>
>>
>> return new ConcurrentHashMap<>(staticMap);
>
> I tried this. I don't think its working. When I just return the map, we lose
> the improvements in performance, and the benchmark overall just runs much
> faster. I'm guessing the map got DCE'ed
Scratch that. Was my mistake. Was running the wrong test.
I'm renaming `testCopyConstructor` to `testConcurrentHashMapCopyConstructor`,
since the file name + test don't actually explicitly say its for
ConcurrentHashMap.
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PR Review Comment: https://git.openjdk.org/jdk/pull/17116#discussion_r1440968465
