speed of invokeExact

[Jochen Theodorou]

please forget what I wrote... I made a mistake

Am 08.05.2013 11:59, schrieb Jochen Theodorou:
> Am 07.05.2013 17:42, schrieb MacGregor, Duncan (GE Energy Management):
>> Which version of the jvm are you seeing this problem on, and are you
>> adapting the method handle every time as well as exact invoking it?
>
> the version is a 1.8.0-ea. Since this is a generic way of method
> invocation I have to adapt it a tiny bit (the arguments come in an Object[])
>
>> We avoided invoke and invokeExact calls from Java (because they were
>> sometimes painful to get correct in the case of varargs methods) by having
>> the fallbacks return the adapted method handle to an exact invoker, like
>> this
>>
>> MethodHandle invoker = MethodHandles.exactInvoker(type());
>> setTarget(MethodHandles.foldArguments(invoker, fallback));
>
> my handles originate from reflection. I don't get them new every time,
> still I have to adapt the handle for actual invocation... like this:
>
>>          MethodHandle mh = call.target.asSpreader(Object[].class, call.args.length);
>>          mh = MethodHandles.insertArguments(mh, 0, call.receiver);
>>          mh = mh.asType(VC);
>
> mh is then used for the invocation using invokeExact
>
>    bye blackdrag
>


-- 
Jochen "blackdrag" Theodorou - Groovy Project Tech Lead
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