Ditto with Apache Groovy, which started off as a dynamically typed language to complement Java. The original use case for Groovy was to use it when performance doesn't matter (e.g. scripting, testing, glue code) and Java (or some other statically typed language) when it does.

Unfortunately VMware wasted a lot of resources trying to redefine Groovy as a performant language which could replace Java's use case, or even run on Android (believe it or not).