openlayers/openlayers — pull request #705 by ahocevar (2012-10-05 07:25:16+00:00)
Title: Image loading performance improvements

Performance improvements are achieved by using requestAnimationFrame when
a tile's visibility changes, and by not starting with a blank image when
creating a new tile image. It seems that even Firefox does not show a
loading placeholder when the tile is made visible in an animation.