RFR: 8347009: Speed ​​up parseInt and parseLong [v3]

[j3graham]

On Sun, 5 Jan 2025 00:12:03 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>  2. The leading zero scenario is not common, and there is no need to optimize this scenario.

Another approach would be to limit the “fast” path to the case where the overall string length is 9 or less. That would allow overflow-free calculation without the extra  bytecode weight of skipping leading zeros, possibly still with simpler code.

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PR Comment: https://git.openjdk.org/jdk/pull/22919#issuecomment-2571479762