id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
2912	Support direct tile access for slippy map like services	avarab@…	team	"I thought WMSPlugin was slow when I viewed an area with it in JOSM, as it turns out it was requesting around 60! zoom 18 tiles to get & display an area to me that looks to be covered by 4 z18 tiles on the OSM tileserver.

I'm attaching a log of the networksniffer I used and screenshots showing what I did, but basically I:

 1. Zoomed into a very small (~ 50x50 meter) are in JOSM
 2. Turned on WMSPlugin/OpenStreetMap
 3. Logged network traffic
 4. Blocked all HTTP traffic (so further request wouldn't be made)
 5. zoomed out to see what tiles JOSM had requested

It turned out that it made 191 GET request to the tileserver to get 57 tiles, so it's getting each tile around 3 times or so:

{{{
avar@aoeu:~$ cat screenlog.3 | perl -pe 's/.*?(?=GET)//'|grep GET.*png|sort|wc -l
191
avar@aoeu:~$ cat screenlog.3 | perl -pe 's/.*?(?=GET)//'|grep GET.*png|sort|uniq|wc -l
57
}}}

All this to cover a [http://www.openstreetmap.org/?lat=52.49362&lon=13.181388&zoom=18&layers=B000FTF very small area], just surrounding that playground there (the green area)."	enhancement	closed	normal		Core imagery	latest	fixed