Josm very slow when the view is outside an imagery limit

[StephaneP]

What steps will reproduce the problem? ¶

1. Load some data around an imagery limit
2. Load the imagery
3. Move the view

What is the expected result? ¶

Normal view scrolling

What happens instead? ¶

very slow scrolling

Please provide any additional information below. Attach a screenshot if possible. ¶

You can use the attached Josm session.
It's even slower with the Potlatch paint style.

Revision: 8487
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Don-vip
Last Changed Date: 2015-06-11 01:00:43 +0200 (Thu, 11 Jun 2015)
Build-Date: 2015-06-11 01:32:10
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 8487

Identification: JOSM/1.5 (8487 fr) Windows 8.1 64-Bit
Memory Usage: 625 MB / 5461 MB (463 MB allocated, but free)
Java version: 1.8.0_45, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Program arguments: [--debug]
Dataset consistency test: No problems found

Plugins:
- DirectUpload (31241)
- OpeningHoursEditor (31241)
- PicLayer (31241)
- cadastre-fr (31241)
- commons-imaging (31241)
- continuosDownload (1413902943)
- download_along (31241)
- editgpx (31241)
- geotools (31126)
- jts (31126)
- opendata (31241)
- photo_geotagging (31241)
- reverter (31241)
- tag2link (31241)
- todo (29154)
- turnrestrictions (31241)
- utilsplugin2 (31241)

Last errors/warnings:
- E: Impossible de trouver l'image "icons/power_tower_low.n.16.png"
- E: Impossible de trouver l'image "icons/power_tower_low.n.16.png"
- E: Impossible de trouver l'image "icons/power_tower_low.n.16.png"
- E: Impossible de trouver l'image "icons/power_tower_low.n.16.png"
- E: Impossible de trouver l'image "icons/power_tower_low.n.16.png"

[stoecker]

What's an imagery limit?

[StephaneP]

The boundary of the imagery layer.
Bing's imagery is covering all the earth, but it's not always the case, like the one used in the attached session.
The "Loire-Atlantique - Orthophotos 2012" imagery covers only a county.

[wiktorn]

In 8488/josm:

Properly handle situation, when tile server returns something else than image file but still gives http status code 200 (like html error page). Closes #11553

[wiktorn]

In 8488/josm:

Properly handle situation, when tile server returns something else than image file but still gives http status code 200 (like html error page). Closes #11553

[StephaneP]

Wow ! That was fast !
It's ok with the 8488 release.

Thank you dear devs !