Super short update: I essentially reached feature parity of the arraymancer backend DF right now.
Still WIP, but the implementation currently lives on the arraymancerBackend branch in the playground dir here: [https://github.com/Vindaar/ggplotnim/blob/arraymancerBackend/playground](https://github.com/Vindaar/ggplotnim/blob/arraymancerBackend/playground) One of the worst offenders of performance before was gather if many columns were involved. An example from this issue: [https://github.com/Vindaar/ggplotnim/issues/39](https://github.com/Vindaar/ggplotnim/issues/39) is down from 12.5 s to only 0.05 s for only the gather call. Progress! :)
