RFR: 8332457: Examine startup overheads from JDK-8294961 [v13]

[Claes Redestad]

On Mon, 3 Jun 2024 10:11:34 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> [JDK-8294961](https://bugs.openjdk.org/browse/JDK-8294961) changed to use classfile API for reflection proxy-generation. Actual implementation of `ProxyGenerator` is focused on performance, however it causes JDK bootstrap regressions. `ProxyGenerator.TEMPLATE` class model is statically created and each proxy class is transformed from the template.
>> 
>> This patch is intended to examine plain proxy generation impact on performance and JDK bootstrap (vs proxy transformation from template).
>> 
>> The generated proxy is migrated from static initialization to CONDY bootstrap.
>> 
>> Please review.
>> 
>> Thank you,
>> Adam
>
> Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:
> 
>   added ProxyGenBench JMH micro benchmark

test/micro/org/openjdk/bench/java/lang/reflect/Proxy/ProxyGenBench.java line 66:

> 64:         ClassDesc tempDesc = ClassDesc.ofDescriptor(Interfaze.class.descriptorString());
> 65:         loader = new ClsLoader();
> 66:         clsMap = new HashMap<>(100);

Suggestion:

        clsMap = HashMap.newHashMap(100);

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PR Review Comment: https://git.openjdk.org/jdk/pull/19410#discussion_r1624192732