RFR: 8339168: Optimize ClassFile Util slotSize

[Chen Liang]

On Wed, 28 Aug 2024 13:12:35 GMT, Shaojin Wen <duke at openjdk.org> wrote:

> A small optimization to improve the performance of jdk.internal.classfile.impl.Util#slotSize/isDoubleSlot

Nice optimization enabled by our PrimitiveClassDesc object sharing.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20747#pullrequestreview-2266376528