RFR: 8268829: Provide an optimized way to walk the stack with Class object only [v9]

[Mandy Chung]

On Wed, 6 Sep 2023 21:35:49 GMT, Brent Christian <bchristi at openjdk.org> wrote:

>> Some benchmarks need the Class reference but some do not.   For simplicity, use only walkers that retain Class reference so that all benchmarks can run with the default walker.
>
> In my mind, a "default" StackWalker (obtained from no-arg`StackWalker.getInstance()`) does not retain the Class instance. I think this will be confusing when the "default" Param value is reported in JMH results.
> 
> I like running the benchmarks with both sets of StackWalker options, but I think the `default` Param value should be changed to something like, `class+methods`.

OK, can rename it.  For the benchmarking purpose, it does not matter if it retains the Class instance or not.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15370#discussion_r1317907061