Dynamicmapservicelayer load time

[DamNguyen]

With many layers, the load time is really long when viewed through a web app viewer. If I use this example to generate a map, and have the list of layers unchecked by default, will it minimize load time?

I'm trying to figure out if dynamicamapservicelayer preloads all the layers, or it only fetches a layer when checked using layer.setVisibleLayers(visible);

Thanks for looking.

[ChrisSmith7]

Dam,

I've had luck generalizing geometries (smoothing features by reducing vertices) and using the FeatureLayer class in ON_DEMAND mode:

FeatureLayer (legacy) | API Reference | ArcGIS API for JavaScript

In my case, I had a large number of polygons that needed to display at a large map scale, so scaling wasn't an option.