snapping is slow because of slow atPoint operation

[bartvde]

This was reported to me. OpenLayers.Geometry.prototype.atPoint is slow because of time taken in OpenLayers.Util.toFloat and the constructor of OpenLayers.Bounds.

The following code which bypasses those is twice as fast:

OpenLayers.Geometry.prototype.atPoint = function(lonlat, toleranceLon, toleranceLat) {
   var atPoint = false;
   var bounds = this.getBounds();
   if ((bounds != null) && (lonlat != null)) { 
       var dX = (toleranceLon != null) ? toleranceLon : 0;
       var dY = (toleranceLat != null) ? toleranceLat : 0; 
       var tb = this.bounds;
       var x = lonlat.lon;
       var y = lonlat.lat;
       atPoint = (x > (tb.left - dX)) && (x < (tb.right + dX)) &&  (y > (tb.bottom - dY)) && (y < (tb.top + dY));
   }
   return atPoint; 
}