RubyMotion for Android features a completely new Ruby runtime specifically designed and implemented for Android development. This is a new implementation of the Ruby language, it does not share code with RubyMotion for the Objective-C runtime. We are using the RubySpec project to make sure the runtime behaves as expected.
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We feature an LLVM-based static compiler that will transform Ruby source files into ARM machine code. The generated machine code contains functions that conform to JNI so that they can be inserted into the Java runtime as is.
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RubyMotion Android apps are packaged as .apk archives, exactly like Java-written apps. They weight about 500KB by default and start as fast as Java-written apps.
It's a bold claim, but I haven't seen anything to back it up. I haven't tried all the apps made with the framework, but I haven't seen too many heavy apps that would require the power. Every game is a puzzler of some sort it seems. Nothing to really test if it is fast enough for gaming, or time critical operations.
That doesn't actually dispute either of the claims you're saying it does. Everything you just quoted can be true and Ruby could still be too slow compared to Objective-C and chew up too much battery.
RubyMotion for Android features a completely new Ruby runtime specifically designed and implemented for Android development. This is a new implementation of the Ruby language, it does not share code with RubyMotion for the Objective-C runtime. We are using the RubySpec project to make sure the runtime behaves as expected.
...
We feature an LLVM-based static compiler that will transform Ruby source files into ARM machine code. The generated machine code contains functions that conform to JNI so that they can be inserted into the Java runtime as is.
...
RubyMotion Android apps are packaged as .apk archives, exactly like Java-written apps. They weight about 500KB by default and start as fast as Java-written apps.
http://blog.rubymotion.com/post/87048665656/rubymotion-3-0-s...