RFR: 8294961: Convert java.base/java.lang.reflect.ProxyGenerator to use the Classfile API to generate proxy classes [v3]

[Adam Sotona]

On Fri, 5 Jan 2024 23:55:53 GMT, Mandy Chung <mchung at openjdk.org> wrote:

> > Profiling of the benchmarks revealed several slowdowns:
> > ```
> > * many expensive conversions from `Class<?>` to `ClassDesc` to `ClassEntry`, or even more expensive `MethodTypeDesc`
> > 
> > * building proxy class from scratch from symbols also involves a lot of `String` concatenations, hashing, encoding and comparisons
> > 
> > * computation of stack maps is also still expensive
> > 
> > * `SplitConstantPool` was ineffective in some specific cases
> > ```
> 
> Do you think these also cause the performance overhead in converting java.lang.invoke to use ClassFile API (#17108)?

Yes, I think it affects all performance critical applications.

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PR Comment: https://git.openjdk.org/jdk/pull/17121#issuecomment-1881235421