Bug
Performance degradation is encountered in ArcGIS API for JavaScript 4.x when a large dynamic map service layer referencing a query layer is added to a new map.
| Bug ID Number | BUG-000118425 |
|---|---|
| Submitted | November 28, 2018 |
| Last Modified | May 26, 2026 |
| Applies to | ArcGIS GIS Server |
| Version found | 10.4.1 |
| Operating System | N/A |
| Operating System Version | N/A |
| Status | Will Not Be Addressed |
Additional Information
The issue occurs on the server end. There are no plans for addressing it in ArcGIS API for JavaScript. The core map service issue was addressed in ArcGIS Enterprise v 11.3 against BUG-000140112.Workaround
When performing a query with the goal of returning a count of features, a possible workaround is to place the following JSON in the outStatistics (Output Statistics) parameter at REST while returnCountOnly remains false:
[{
"statisticType": "count",
"onStatisticField": "ObjectID",
"outStatisticFieldName": "OIDs"
}]
This method results in the query results being returned in under 1 second.
The Javascript API should use the outStatistics parameter instead of returnCountOnly when retrieving a count of features in a layer upon adding the FeatureLayer to a map.
Steps to Reproduce
Bug ID: BUG-000118425
Software:
- ArcGIS GIS Server
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