Summary: With the previous approach it was hard to read the name of the node, this should be a lot clearer. The tool top comes in a after a delay, the reason for this is because when i tried without a delay when you moved the mouse fast a ton of tooltips would appear and disappear when you passed over diffferent nodes and it was very distracting. 200ms seems to be about the sweet spot
Reviewed By: lblasa
Differential Revision: D41548248
fbshipit-source-id: 76460347730d5b1d2e968984e845be0c65255456
6183671a5d