RFR: 8349176: Speed up Integer/Long.toString via Unsafe.allocateUninitializedArray

[Shaojin Wen]

On Wed, 29 Jan 2025 16:36:24 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> The byte[] allocated in Integer/Long.toString is fully filled, so we can use Unsafe.allocateUninitializedArray to create byte[] to improve performance.

Keep it alive.

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PR Comment: https://git.openjdk.org/jdk/pull/23353#issuecomment-2708921634