Having too many timing points visible at once on the timing tab in the editor results in a huge, unreasonable performance drop which makes it very difficult to continue working on the map. A large amount of greenlines is used in mania for smooth SV changes.
(Framerate is in lower right corner)
Example 1, map in progress: no points, points
Example 2, finished and uploaded map: no points, points
(Framerate is in lower right corner)
Example 1, map in progress: no points, points
Example 2, finished and uploaded map: no points, points