From what I understand everything runs on the primary thread. So this is a feature request -- but if done possible sooner would eliminate any later incompatibilities. Having the main thread run the interface and JS runtimes means that hiccups can and will occur frequently. Either the design where the interface is run on its own thread; and the engine is on its own or the ability to start webworks will eliminate these types of issues where you need to do any long running calculations.

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