I love Groovy. I also love the new streams functionality in JDK 8. But, I am
weary of the performance implications of Groovy + Streams, because to use
streams you must use Groovy closures. I see the code generated creates a new
closure instance then uses castToType to cast the closure to the JDK8
functionality interface. Does Groovy make this efficient, or is the proxy
generation from this going to be excessive if running a lot of small stream
operations?
I think an interesting feature of Groovy would be if it sees a closure cast
implicitly or explicitly to a certain interface type, it could make the closure
implement the interface. You'd still have the overhead of compile-time class
generation versus lambdas, but at least you wouldn't have to create proxies,
and maybe there is an improved chance of JIT inlining? Even if it was supported
within a single statement, like "Function<String, String> x = {it.trim()}" or
Stream.of("abc").map { it.trim() }, the closure with trim could implement
Function. Of course for backwards compatibility the class could still extend
Closure and still implement call methods, but also implement the method apply,
which delegates to call.
Jason Winnebeck
Software Engineer III Contractor - IT Software Development | Windstream
600 Willowbrook Office Park, Rochester, NY 14450
[email protected]<mailto:[email protected]> |
windstreambusiness.com
o: 585.794-4585
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