Large displays painfully slow

[tfmorris]

Basically any plot longer than 3 days is unusable, it least with Chrome on Mac. Part of the problem may be the increasing price volatility which creates more data to be plotted, but I suspected it could be related to this bug as well: novus/nvd3#691

Perhaps updating to more modern versions of nvd3 and d3 would fix, or at least improve, things as an easy fix. Also, it seems like the Voronoi feature is pretty heavy-weight, so perhaps an option could be provided to turn it off chart.useVoronoi(false).

[tfmorris]

I looked into this a little bit more and it looks like AdBlockPro was part of the problem, but there's definitely a problem with the Voronoi diagram.

One test (8 days, I think) broke down as:
14 sec. - fetch from server
2 sec. - render chart
6 sec. - update interactive layer (Voronoi)
11 sec. - ABP filter processing (!!)

But turning off ABP and going up to 30 days showed there's some kind of O(n^2) action going on with the Voronio diagram:
20 sec. - fetch
6 sec. - render
3 sec. - D3 timer flush (??)
4.9 min - update interactive layer (!!) - 4.8 min. of which is in d3.geom.voronoi

The Voronoi based interaction layer is a nice UX addition, but I'd happily give it up to get back 5 minutes every time I wanted to plot a chart.