RFR: 8285447: StackWalker minimal batch size should be optimized for getCallerClass [v4]

[Mandy Chung]

On Tue, 12 Sep 2023 21:06:15 GMT, Brent Christian <bchristi at openjdk.org> wrote:

>> Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   cleanup
>
> test/micro/org/openjdk/bench/java/lang/CallerClassBench.java line 45:
> 
>> 43: public class CallerClassBench {
>> 44:     static final StackWalker INST = StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
>> 45: 
> 
> Could `DROP_METHOD_INFO` also be used here?

yes but it's irrelevant in this benchmark as `getCallerClass` should be independent to `DROP_METHOD_INFO` option.  The implementation always drops method info in the implementation.  It does not affect the result.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15642#discussion_r1323580483