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From Jochen Theodorou <>
Subject Re: Building Groovy
Date Mon, 18 Dec 2017 14:54:07 GMT
On 18.12.2017 01:01, MG wrote:
> Just came across this as an example where using Groovy 2.4.6 
> invokedynamic seems to have been much slower than the older callsite 
> caching mechanism: 
> (

It is a chicken-egg problem. We still need to optimize indy in some 
areas. But this does not happen if no users care to give detailed 
reports which we can base optimizations on. They on the other hand 
simply switch to static compilation or old callsite caching then. So in 
the end there is no optimization, because optimizations tend to inflate 
and complicate code.

And for the old callsite caching there is another part... I highly doubt 
it is still well working with JDK9. Worse, I do not see how this can be 
made work efficiently under JDK9. The preferred way in JDK9 is 
invokedynamic after all. And while they (JDK developers) tend to 
increase the capabilities of invokedynamic, it is the opposite story for 
reflection (deep reflection, callsite sensitive rights made even worse 
through modules, ...)

So frankly I do not see much of a future for the old callsite caching

bye Jochen

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