id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
16698	Slow performance in filters	naoliv	team	"When working with a lot of data it's possible to feel that JOSM reacts very slowly to, basically, anything (even adding a single node and some tags).

Profiling it with visualvm it's possible to see that, when doing a simple test of adding a node and unselecting it, JOSM uses a fair amount of time dealing with filters, even though I don't have any filters enabled¹:

[[Image(https://i.imgur.com/gTLNEkY.png)]]

¹ I have some filters, but none of them are enabled:
[[Image(https://i.imgur.com/wYwpjfY.png)]]

Could this somehow be improved?
Maybe have some option (even if hidden) to completely (and temporarily) disable the filter system?

Even to open the status report dialog I can feel the slowness (and it seems that the filter system also affects it?)
[[Image(https://i.imgur.com/u4pQs7i.png)]]


JOSM:
{{{
Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-08-29 23:16:52 +0200 (Wed, 29 Aug 2018)
Revision:14204
Build-Date:2018-08-30 01:32:31
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (14204 pt_BR) Linux Debian GNU/Linux testing (buster)
Memory Usage: 4739 MB / 7168 MB (2503 MB allocated, but free)
Java version: 10.0.2+13-Debian-1, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900, :0.1 1280x1024
Maximum Screen Size: 1600x1024
Java package: openjdk-10-jre:amd64-10.0.2+13-1
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-21
VM arguments: [--add-modules=java.activation,java.se.ee, -Dawt.useSystemAAFontSettings=gasp]
Dataset consistency test: No problems found

Plugins:
+ ImportImagePlugin (34576)
+ OpeningHoursEditor (34535)
+ PicLayer (34544)
+ SimplifyArea (34586)
+ apache-commons (34506)
+ buildings_tools (34572)
+ download_along (34503)
+ editgpx (34506)
+ ejml (34389)
+ geojson (87)
+ geotools (34513)
+ jts (34524)
+ log4j (34527)
+ measurement (34529)
+ opendata (34576)
+ pbf (34576)
+ poly (34546)
+ reverter (34552)
+ scripting (30787)
+ tageditor (34560)
+ todo (30305)
+ turnlanes-tagging (272)
+ turnrestrictions (34576)
+ undelete (34568)
+ utilsplugin2 (34506)
}}}"	enhancement	closed	normal	18.09	Core		fixed	performance filter