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Clojure is unique among the languages I listed because it uses persistent data structures by default (being a functional language), which necessarily generates

Clojure is unique among the languages I listed because it uses persistent data structures by default (being a functional language), which necessarily generates a lot of transient garbage. The reflection problems are not specific to Dalvik; they unhinted Java calls cause slowdown on the JVM as well. But it's easy to get around this with type hints.

Tichy 16y ago
The reviews I read pointed to reflection as the main problem of Dalvik. Are there examples of successful non-Java apps for Android yet? I have written an app in JavaScript going the HTML5 route, but it required some Java glue code. The JavaScript engine is V8 (at least on Froyo), so it is fast.