RFR: 8331744: java.lang.classfile.TypeKind improvements [v4]

[Chen Liang]

On Thu, 9 May 2024 07:23:16 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> Chen Liang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Hash table, use fixed random seed
>
> src/java.base/share/classes/java/lang/classfile/TypeKind.java line 139:
> 
>> 137:             case 'V' -> TypeKind.VoidType;
>> 138:             default -> throw new IllegalArgumentException("Bad type: " + s);
>> 139:         };
> 
> This maps to a `tableswitch`, could you explain why a statically initialized array addressed with a custom hash code suppose to be faster?
> Thanks.

I actually am not sure of the reason; it is indeed a tableswitch in bytecode. @cl4es might know it better?

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PR Review Comment: https://git.openjdk.org/jdk/pull/19109#discussion_r1595360109