OpenStreetMap
I'm extremely impressed by the speed of the mapnik layer rendering recently. I just made some edits and they were rendered by the time I'd returned to the map, literally seconds after my changeset was closed.
This will be really good for the newbies as they won't get worried about their data not having been saved.
Discussion
Comment from wilpin on 20 September 2009 at 07:14
I've noticed the same but more in sparsely mapped regions. Hope this continues. Mapnik doesn't seem to like corrections in heavily mapped areas.
Comment from Alex McKee on 20 September 2009 at 07:36
Yes this was a more sparse area and having been editing more detailed areas over the last few hours I agree that the tiles don't seem to be re-rendered so quickly in the more heavily mapped areas.
I wonder if this is something to do with the way the tile system is set up to render. The way it works, if I understand it correctly, is when a tile is viewed it is checked for freshness. If it's not fresh then it's queued for re-rendering. Tiles in urban areas are more likely to be viewed often and OSM data is generally more detailed in urban areas so that could be the cause of that affect.
Regardless it's a tremendous achievement for OSM to render tiles so very quickly at all and I also hope that it continues. :)
Comment from robert on 20 September 2009 at 12:08
I've noticed this too. I sometimes watch the live edit feed @ http://datenkueche.com/osmlive/ and in the last few days the changes have been rendered by the time they show up there.
Comment from marscot on 21 September 2009 at 11:27
yeah its very fast, great work.