Greetings - I have been migrating some miscellaneous things from the classic mapviewer/webappbuilder to the new mapviewer and experience builder.
I notice the new map viewer takes a performance hit as soon as you start adding more than 15-20 feature layers in one map. I can even have these layers all off by default and still experience issues panning around the basemap. Overall it's slow and laggy.
In Classic, I have some county-wide maps with 100+ layers and it handles it well. I really like what the new viewer provides in grouping layers, so I wish I could migrate these maps into the new viewer.
Anyone experience this and found a fix?