RFR: 8315585: Optimization for decimal to string [v2]

[温绍锦]

On Mon, 9 Oct 2023 19:20:29 GMT, 温绍锦 <duke at openjdk.org> wrote:

>> I submitted PR #15555 before, and there were too many changes. I split it into multiple PRs with small changes. This one is one of them.
>> 
>> this PR removed the duplicate code for getChars in BigDecimal#StringBuilderHelper, i also make performance faster.
>> Please review and don't hesitate to critique my approach and patch.
>
> 温绍锦 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   refactor based on @liach 's review

Based on @liach 's review suggestions, I reduced the changes to JavaLangAccess and further removed the duplicate code in BigDecimal.

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

PR Comment: https://git.openjdk.org/jdk/pull/16006#issuecomment-1753712589