I don't know - all of them? I've heard comments in the WME chat from a number of other people who have traced down really bad lag to Highlights - they've all said that disabling the addon gets rid of most of the lag. I finally tried it and was amazed by how much faster I could scroll around and move roads and so on.
I'll try turning off place highlighting to start and see if that has any impact. Will progress from there and will let you know if/what I find.
Edit: Ok, I've had a chance to play around with it a bit. I still see lag when the plugin is enabled, but it does seem to be considerably worse when place highlighting is turned on. When I turn it off, I still seem to get bits of lag here and there, but not to the extent that there is when place highlighting it turned on. I'll continue to observe and play with it and will let you know if I notice anything else.
I'll try turning off place highlighting to start and see if that has any impact. Will progress from there and will let you know if/what I find.
Edit: Ok, I've had a chance to play around with it a bit. I still see lag when the plugin is enabled, but it does seem to be considerably worse when place highlighting is turned on. When I turn it off, I still seem to get bits of lag here and there, but not to the extent that there is when place highlighting it turned on. I'll continue to observe and play with it and will let you know if I notice anything else.
Re: [Script] WME Color Highlights - 1.94 Oct 2014