topic Re: Performance of v4.21, compare with v3.33 in ArcGIS JavaScript Maps SDK Questions

Performance of v4.21, compare with v3.33

KaiPongNg — Fri, 14 Jul 2023 04:05:17 GMT

Anyone got an idea, why the map display performance becomes poor after API for Javascript migrated from v3.33 to v4.21 with same WebMap content. The map content included a local base map of Hong Kong and 5x dynamic layers. The performance of 3D view is much better by compare with 2D map display 😖.

Demo video: Performance JS API 4.21.mp4 & Performance JS API 3.33.mp4

ArcGIS Enterprise 10.8.1

Geodatabase on SQL Server 2019

Chrome browser (latest)

Re: Performance of v4.21, compare with v3.33

UndralBatsukh — Fri, 14 Jul 2023 16:07:33 GMT

Hi there,

It would be really hard to say why you are seeing what you are seeing without a reproducible case. Would you be able to share your app with us? Also have you tested the app with the latest version 4.27?

Re: Performance of v4.21, compare with v3.33

KaiPongNg — Wed, 19 Jul 2023 02:18:42 GMT

Hi UndralBatsukh,

As the demo videos shown, the usage of GPU in 4.21 was "huge" by comparing with 3.33. We also experienced that the map display was delayed. Same client machine and same map services.

We cannot share the application here since they are deployed in client's Intranet. Is there any lead for us to diagnostic?

I will arrange test on latest API first. Thanks for your reply.

Re: Performance of v4.21, compare with v3.33

UndralBatsukh — Wed, 19 Jul 2023 15:06:32 GMT

Hi there,

Please contact support services to get additional help on this. Perhaps screensharing will help to narrow down the issue.

Re: Performance of v4.21, compare with v3.33

KaiPongNg — Fri, 11 Aug 2023 03:39:36 GMT

https://support.esri.com/en-us/bug/arcgis-api-for-javascript-4x-is-rendering-slower-and-la-bug-000110153

Finally, it is a bug which classified as "Will not be addressed".

Re: Performance of v4.21, compare with v3.33

Angelo_BryanPerito — Fri, 13 Dec 2024 00:52:51 GMT

we got same experience, as usual, Esri/Arcgis developer doesnt care and cannot really help customer. support license is useless. We also have issue on firefox where if you do a browser accessiblity zoom on certain extent it will clip the popup. WMSLayer not working like the previous WMSLayer.. and probably the issue on graphics not showing on certain GPU is also "will not be addressed"

Re: Performance of v4.21, compare with v3.33

ConorFlynn — Wed, 30 Jul 2025 15:14:47 GMT

According to Google:

Here's why some users experience slowdowns in the ArcGIS API for JavaScript 4.x compared to 3.x:

Changes in layer objects: ArcGISDynamicMapServiceLayer objects, used in 3.x, are no longer available in version 4.x. Upgrading to 4.x requires using FeatureLayer objects, which can result in more requests to the GIS server and longer loading times for maps and layers, according to some users.