openlayers/ol3 — pull request #103 by twpayne (2013-01-11 15:18:21+00:00)
Title: Tile queue

This pull request adds a tile queue, with some nice features:

* Tiles nearest the map center are loaded first
* The number of simultaneous requests is throttled
* The tile queue is managed between `requestAnimationFrame` callbacks to ensure a smooth frame rate
* A priority queue is used to ensure good algorithmic complexity