Some of the animations are really long

[kingfisher13]

Could be perhaps speed up the animation for distances over a certain length?

[kingfisher13]

There is a maxDuration option (set at 5 seconds), but some of the animations are not respecting this. See May 30th, 1760, #4 for an example (it takes 8.3 seconds).

[kingfisher13]

Looking deeper, each frame (using example from above) is calculated to take 2.8 ms and there are 1741 of them, resulting in an estimated 4.9 seconds (rounding accounts for the 0.1 diff from 5 second max). However, each frame is actually taking (according to console.time) anywhere from 4.5-5.5 ms resulting in an actual time of 8.3 seconds for the animation.

The AnimatedMarker.js (ditto AnimatedLine.js) code looks fine to me, so I'm not sure where the delay is coming from. @awoodruff I'd appreciate some help when you have time.

[awoodruff]

The above commit is an improvement, though it looks it may have sped up the long ones just a bit too much. The idea is to increase the distance option (which controls the number of interpolated coordinates in a line) on an animated line if the total distance divided by distance is greater than some maximum number of animation frames. I chose 20ms as the fastest allowable framerate, hence this._maxFrames = Math.round(options.maxDuration / 20);