Kibana Graph plugin - long terms cause rendering performance problems

Due to some duff data, one of my terms retrieved in the graph was 1014 chars. The rendering (where all the vertices whizz around initially) was horrible - maybe 1-2 fps.
Obviously I shouldn't have duff data, but maybe some kind of optimisation is needed to truncate fields before they hit the renderer (with an indication that they have been)?

I've had similar issues - both truncation and word wrapping would be useful for labels