RFR: 8287798: Reduce runtime of java.lang.reflect/runtime microbenchmarks

[Mandy Chung]

On Fri, 3 Jun 2022 12:46:31 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Add explicit run configurations to java.lang.reflect and .runtime micros, aiming to reduce runtime while maintaining a decently high confidence that there's enough warmup to produce good enough data.
> 
> Roughly halves runtime of running `java.lang.reflect|java.lang.runtime` from 159 to 78 minutes.

Marked as reviewed by mchung (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/9013