RFR: 8310929: Optimization for Integer.toString [v13]

[温绍锦]

On Wed, 26 Jul 2023 20:31:16 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

> It could be worth it to have a cache for small integers to skip the calculations altogether.

this PR is only for calculation optimization. caching small values should be a separate PR

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

PR Comment: https://git.openjdk.org/jdk/pull/14699#issuecomment-1653445373