RFR: 8281168: Micro-optimize VarForm.getMemberName for interpreter [v2]

Tue Feb 8 17:48:16 UTC 2022

On Tue, 8 Feb 2022 17:39:37 GMT, Mandy Chung <mchung at openjdk.org> wrote:

> This change looks okay. One biggest cold startup overhead we measured for JEP 416 is due to the overhead of spinning and loading classes of MH/VH. This micro-optimization focuses on the performance of VH invocation. Do you see class spinning and loading from your benchmark? Maybe in the generic invocation case?

Not really, I am trying to see that `-Xint` does not have easy to fix impediments to cold performance. In this benchmark, bootstrapping stuff had already happened at warmup, it measures the overheads of doing all the MH/VH without the optimizing compiler assistance.

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PR: https://git.openjdk.java.net/jdk/pull/7333