id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
16128	Viewport movement and zooming is terribly slow	jengelh@…	team	"Between r7000 and r10526, the draw operation for JOSM nodes and ways went significantly worse to the point of unusability. Java 8 (and later) also play a role, as running 10526 with java7 brings back at least some of the performance.

This seems to concern mostly viewport actions, such as scrolling and zooming the map with the right mouse button/scrollwheel. Moving, for example, a node or polygon around while keeping the viewport unchanged still has acceptable performance.

Since there are no .jar files between 7000 and 10526 on the download server anymore, I cannot narrow it down, and building revisions between that with ant also fails in many ways indistinguishable from magic.

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-07-11 23:04:49 +0200 (Mon, 11 Jul 2016)
Build-Date:2016-07-12 01:31:48
Revision:10526
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10526 en) Linux openSUSE Leap 15.0 Beta
Memory Usage: 273 MB / 1730 MB (189 MB allocated, but free)
Java version: 1.8.0_161-b12, Oracle Corporation, OpenJDK 64-Bit Server VM
}}}"	defect	closed	major	18.12	Core mappaint		fixed	performance regression	bastiK stoecker michael2402 rhardy702@…