RFR: 8341402: BigDecimal's square root optimization [v31]

[Joe Darcy]

On Mon, 10 Feb 2025 09:17:51 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR seems to be targeting performance, yet no benchmarks are provided comparing the current vs. proposed branch with respect to performance. We need to understand the upside of the proposed changes.

At my request, reimplementing BigDecimal.sqrt was done separately from the (now integrated) improvements to BigInteger.sqrt.

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PR Comment: https://git.openjdk.org/jdk/pull/21301#issuecomment-2657731793