RFR: 8331187: Optimize MethodTypeDesc and ClassDesc.ofDescriptor for primitive types [v2]

[Claes Redestad]

On Fri, 26 Apr 2024 11:27:35 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

> Looks like your `MethodTypeDescFactories` benchmark is missing form the PR?
>

Pre-existing.

> Does removing the explicit null checks make that much difference for performance? They are kind of nice for clarity.
> 

It helps startup at least. The redundant array depth check mattered a bit for peak performance, but not much. I don't have a strong opinion really, just find them a bit superfluous when there's a dereference on the next line.

> Also, looks like the copyright year still needs to be updated on some of the files.

Fixed, along with using `EMPTY_CLASSDESC` in the `toArray` call.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/18971#issuecomment-2079232756