Its evident from the flamegraph that the architecture is fundamentally different. Why are the stacks so deep in the javascript example? Why aren't they using a

Its evident from the flamegraph that the architecture is fundamentally different. Why are the stacks so deep in the javascript example? Why aren't they using a similar worker pool in the node implementation? Are they just throwing everything onto the event queue and treating that as a naive worker pool? If you know the limitations of your tools then you can work around them. This was clearly not done in this case.