RFR: 8295302: Do not use ArrayList when LambdaForm has a single ClassData [v3]

[Andrey Turbanov]

On Mon, 17 Oct 2022 21:48:42 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> Please review this small optimization. As shown in the JBS issue, most of the generated LambdaForm classes have a single ClassData, so we can get a small footprint/speed improvement.
>
> Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
> 
>  - Merge branch 'master' into 8295302-no-arraylist-for-single-classdata-for-lambdaform
>  - @mlchung comments
>  - @iwanowww comments
>  - 8295302: Do not use ArrayList when LambdaForm has a single ClassData

src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java line 352:

> 350:     private Object classDataValues() {
> 351:         final List<ClassData> cd = classData;
> 352:         return switch(cd.size()) {

Suggestion:

        return switch (cd.size()) {

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PR: https://git.openjdk.org/jdk/pull/10706