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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
The issue really is stack space. As the parse tree is effectively on the stack, having two things running concurrently is likely to fill it up pretty quick. You could just rewrite the quicksort to jump out early.
Can you post your quicksort? I'd like to add it as a benchmark.
The best solution here would be to implement the quicksort natively though. It should be quite easy (and fast) with iterators and I imagine it would be used a lot.