I've had the same experience on a Nexus 7, and when I turn on the developer system monitoring it always either pushes memory into swap or maxes out some cpu cor

I've had the same experience on a Nexus 7, and when I turn on the developer system monitoring it always either pushes memory into swap or maxes out some cpu cores and doesn't properly utilize all 4. The biggest culprit I would say is that you have 4 cores but your computationally expensive javascript is never multithreaded. Though I do acknowledge the internal memory is slow as crap.