80x faster than using Pandas? What if you just used the Numpy values array?

You will get me into trouble! I said 80x faster than the Python prototype. I did benchmark this vs Pandas over the years and depending on the usecase the two codebases trade blows with each other for static data. However for streaming datasets Perspective has a large advantage over Pandas since pandas does a full group by on every update, while perspective does its work incrementally using deltas.

I'm curious if you did any profiling? If the intent was always to rewrite the whole prototype in C++ then it kinda wouldn't matter, eh?

We do some benchmarking just for catching performance regressions and validating assumptions against the non-WebAssembly version, but definitely need more in this regard. [benchmark for wasm build](https://jpmorganchase.github.io/perspective/examples/benchma...)