id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
17279	[Patch] improve performance when retrieving history	GerdP	team	"==== What steps will reproduce the problem?
1. Start JOSM with --debug
2. Open URL https://www.openstreetmap.org/changeset/66843961
3. Look at the debug messages
==== What is the expected result?
No calls of GET https://api.openstreetmap.org/api/0.6/changesets?changesets
==== What happens instead?
Note that JOSM downloads a lot of changeset data for each object
{{{
GET https://api.openstreetmap.org/api/0.6/node/2087192798/history -> 200
...
GET https://api.openstreetmap.org/api/0.6/changesets?changesets=45597783,15351356,14450647 -> 200 (687 B)
...
GET https://api.openstreetmap.org/api/0.6/node/6245181047/history -> 200
...
GET https://api.openstreetmap.org/api/0.6/changesets?changesets=66748602 -> 200 (439 B)
}}}
The data retrieved with the `GET https://api.openstreetmap.org/api/0.6/changesets?changesets` is not used.
==== Please provide any additional information below. Attach a screenshot if possible.
The same problem occurs with the undelete plugin. Without these calls both acions are much faster.
{{{
Build-Date:2019-02-02 09:47:56
Revision:14756
Is-Local-Build:true

Identification: JOSM/1.5 (14756 SVN en) Windows 10 64-Bit
OS Build number: Windows 10 Home 1803 (17134)
Memory Usage: 572 MB / 1753 MB (367 MB allocated, but free)
Java version: 1.8.0_191-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:64582, -ea, -Dfile.encoding=UTF-8]
Program arguments: [--debug]

Plugins:
+ OpeningHoursEditor (34867)
+ apache-commons (34506)
+ buildings_tools (34867)
+ continuosDownload (82)
+ download_along (34869)
+ ejml (34389)
+ geotools (34513)
+ jaxb (34678)
+ jts (34524)
+ o5m (34867)
+ opendata (34867)
+ pbf (34867)
+ poly (34867)
+ reltoolbox (34867)
+ reverter (34867)
+ undelete (34877)
+ utilsplugin2 (34867)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
}}}
"	defect	closed	normal	19.02	Core		fixed	template_report