id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
7159	Layer merging performance	Don-vip	team	"The ""merge layer"" action can be slow as hell. With these two data sets, including only new primitives:
- A: 30.000 highways, 80.000 nodes, 9.000 relations associatedStreet
- B: 65.000 addr:housenumber

The loading of each data set takes only few seconds. However if I try to merge them, I'm forced to cancel the operation after several minutes of processing without any visual indication of the remaining time.

Two things to do here:
- Speed up the process, it shouldn't take so long (I have added some traces to measure performances, JOSM merges nodes at the incredible speed of 40 nodes per second !)
- Indicate in a progress bar the advancement (currently, there is no progress bar at all)"	defect	closed	normal		Core	latest	fixed