RFR: 8323183: ClassFile API performance improvements

[Chen Liang]

On Mon, 8 Jan 2024 13:38:16 GMT, Adam Sotona <asotona at openjdk.org> wrote:

> ClassFile API performance related improvements have been separated from #17121 into this PR.
> 
> These improvements are important to minimize performance regression of
> 8294961: Convert java.base/java.lang.reflect.ProxyGenerator to use the Classfile API to generate proxy classes #17121
> 
> Please review.
> 
> Thanks,
> Adam

You need to update the slot counting from `DirectCodeBuilder` and `StackMapDecoder` to fully avoid creating any MethodTypeDesc.

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PR Comment: https://git.openjdk.org/jdk/pull/17306#issuecomment-1881145755