RFR: 8319447: Improve performance of delayed task handling [v4]

[Doug Lea]

On Tue, 25 Feb 2025 14:37:49 GMT, Viktor Klang <vklang at openjdk.org> wrote:

>> Doug Lea has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Standardize parameter checking
>
> src/java.base/share/classes/java/util/concurrent/DelayScheduler.java line 99:
> 
>> 97:      * is typical with IO-based timeouts). The use of a 4-ary heap (in
>> 98:      * which each element has up to 4 children) improves locality and
>> 99:      * reduces movement and memory writes compared to a standard
> 
> Suggestion:
> 
>      * which each element has up to 4 children) improves locality,
>      * reduces movement, and memory writes compared to a standard

Now:
     * which each element has up to 4 children) improves locality, and
     * reduces the need for array movement and memory writes compared

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PR Review Comment: https://git.openjdk.org/jdk/pull/23702#discussion_r1970465266