On Thu, 9 Mar 2023 11:15:44 GMT, Adam Sotona <asot...@openjdk.org> wrote:
>> src/java.base/share/classes/java/lang/reflect/ProxyGenerator.java line 661:
>>
>>> 659: */
>>> 660: private void generateMethod(ClassBuilder clb, ClassDesc
>>> className) {
>>> 661: MethodTypeDesc desc = MethodType.methodType(returnType,
>>> parameterTypes).describeConstable().orElseThrow();
>>
>> Can we convert this line to:
>>
>> MethodTypeDesc desc = MethodTypeDesc.of(toClassDesc(returnType),
>> Arrays.stream(parameterTypes).map(ProxyGenerator::toClassDesc).toArray(ClassDesc[]::new));
>>
>>
>> Mainly due to that `MethodType` creation involves a lot of unrelated process
>> such as generating lambda forms, and we can remove the `MethodType` import
>> as a result.
>
> Isn't the "unrelated process such as generating lambda forms" critical for
> the `ProxyGenerator` functionality?
More accurately, I mean the overhead generated by this:
https://github.com/openjdk/jdk/blob/1e9942aa112edca33f964db127df6c9ce41e86ff/src/java.base/share/classes/java/lang/invoke/MethodType.java#L408
That method type construction is somewhat expensive and involves extra work
besides simply storing the return class and the parameter classes.
-------------
PR: https://git.openjdk.org/jdk/pull/10991
