What are the green arrows on the map?
A green arrow represents a cluster of game info markers. Loading all the game markers at once uses a lot of memory and can bring some browsers to a crawl. The arrows combine game markers that are close together so the total number of items your browser has to render stays low and the site stays fast. Hover over an arrow to see how many markers are clustered underneath it; click on the arrow to zoom in and see those markers.