topic Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView in ArcGIS JavaScript Maps SDK Questions

Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

EmilAura — Thu, 23 Jan 2025 08:11:21 GMT

Hi,

We're recently switched from FeatureLayers applyEdits to Client-side StreamLayer in our application and have had some performance issues since. The problems seem to be related to the updates triggered by the updateInterval of the StreamLayer. These updates seem to be triggered even thought

The Layer is empty
No messages have been sent to the layer

These updates trigger quite a lot of GPU usage on low end hardware (up to 70-100%) on integreated graphic cards. The result is a constant high GPU usage.

We tried mitigating this in the following way

calling layerview.pause() on init
resume() on the data-received event
pause again once layerView.updating is false

This works fine on Mapview, but Sceneview seem to be stuck in an endless update (update is always true).

We also tried calling layer.refresh on data-received. This works on MapView, but the layer is not refreshed in Sceneview. Refresh is called, but it seem to get stuck on _debounceHasDataChanged.

We'de idealy like to trigger a debounced update of the layer only when data has actually been received (the data-received event)

Attached is two identical stackbliz projects. One with Mapview and one with Sceneview. I've also added a video showing the dev console for both projects, to showcase that the update events aren't triggered in the Sceneview.

MapView

Sceneview

(view in My Videos)

Video showcasing perfomance problems on an empty streamlayer. i5, 8BG RAM integrated Intel graphics.

Thank you and best regards,

Emil

Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

UndralBatsukh — Thu, 23 Jan 2025 15:47:35 GMT

Which version of 4.x are you using?

Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

EmilAura — Mon, 27 Jan 2025 07:23:24 GMT

We're using 4.31.6

Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

UndralBatsukh — Mon, 27 Jan 2025 16:40:24 GMT

cc @SaschaBrunner

Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

GreteSoosalu — Mon, 31 Mar 2025 16:01:36 GMT

Hi @EmilAura FYI we're still looking into the SceneView updating issue.

Re: Client-side StreamLayer perfomance problems and different update behavior in Map/SceneView

SaschaBrunnerCH — Fri, 04 Jul 2025 09:40:12 GMT

Thanks for reporting this issue. This will be improved with the next release 4.34 and "update" will show reflected accordingly.