RFR: 8310929: Optimization for Integer.toString [v2]

[温绍锦]

On Wed, 28 Jun 2023 17:53:04 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> 温绍锦 has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   postpone the division
>
> src/java.base/share/classes/java/lang/Integer.java line 478:
> 
>> 476: 
>> 477:         byte[] buf;
>> 478:         if (q1 == 0) {
> 
> You could postpone the division to compute `q1` later, and here test whether `i < 1_000`.
> I've no statistics, but I guess it makes sense to optimize for tiny `int`s by avoiding a division.

I have submitted the changes and updated the benchmark results, which shows an improvement.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14699#discussion_r1245940981