openlayers/openlayers — Issue #298: Tiling performance regression
Author: elemoine
Created: 2012-03-07 09:02:42+00:00
State: open

I think the recent grid refactoring (5e734f20) has introduced a regression in the tiling performance.

I'm observing this on the [mobile example](http://www.openlayers.org/dev/examples/mobile.html). With a cold browser cache when I click on the + button to zoom in it takes approximately 1 second to load all the tiles for the new zoom level. If I checkout 40806db (the grid refactoring commit's parent) the same operation takes approximately 250ms. It looks like the refactoring decreases the level of parallelization.

I hope I can provide more information later, but this initial experience demonstrates the regression I think.