I concur it is probably not a good idea. I know from other benchmarks that Dalvik in general has terrible performance and adding a layer on top of it is just going to make it worse.

[3 days ago on HN] Dalvik vs. SpiderMonkey vs. Native https://news.ycombinator.com/item?id=6173757

Appcelerator originally did Rhino on Dalvik and moved to V8 after benchmarks showed Rhino was terrible. http://developer.appcelerator.com/question/133696/what-is-v8...