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In Groovy 2.0, most method calls were using the “invoke dynamic” instruction, but there have been exceptions: constructor calls or “spread calls” (where you pass arguments with the “spread operator”). Groovy 2.1 completes the implementation started in 2.0. Now, code compiled with the “invoke dynamic” JAR on JDK 7 will not be using the old “call site caching” code which served us well for getting good performance for Groovy prior to JDK 7. If you are lucky enough to be using JDK 7 in production, be sure to use the Groovy 2.1 “indy” JAR to benefit from the full “invoke dynamic” support. The “indy” version is bundled with the binary download package and can be obtained via Maven (all JARs with “invoke dynamic” support are postfixed with “-indy”).

You can learn more about the invoke dynamic support.

GPars 1.0

Groovy 2.1’s distribution bundles the recently released GPars 1.0, the one-stop shop for all your concurrency needs. This new version comes with various enhancements in the asynchronous functions, promises, parallel collections, actors, dataflow support, Google App Engine support, etc.

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