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Tile feature requests for points vs lines

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08-22-2023 12:42 PM
ChristopherFrickeASL
New Contributor

When I load a point layer arcgis server into a feature layer in arcgis js sdk, it does the following request sequence:

  1. .../query?f=json
  2. .../query?resultRecordCount=true
  3. .../query?limit=2000&offset=0
    {pages through till count from step two is hit}

When I load a polyline layer from arcgis server into a feature layer in arcgis js sdk, it does the following request sequence:

  1. .../query?f=json
  2. .../query?f=geometry={'xmin': xxx, 'ymin': xxx etc}
    {pages through each tile in the map view and updates as panning around}

I am trying to figure out why points feature services do a big count and then paginate with limit/offset and polylines paginate by tile? Can I force the JS sdk to use one or the other?

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UndralBatsukh
Esri Regular Contributor

Hi there, 

That is because the API fetches all of point features at once from the server. Once loaded, the features won't need to be re-requested from the server, which will make future redraws after panning and zooming much faster.

This is the release note: https://developers.arcgis.com/javascript/latest/4.19/#performance-improvements

If you need to disable this behavior for some reason then you can read how from this post: https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/arcgis-4-2x-now-much-slower-to-fe...

 

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UndralBatsukh
Esri Regular Contributor

Hi there, 

That is because the API fetches all of point features at once from the server. Once loaded, the features won't need to be re-requested from the server, which will make future redraws after panning and zooming much faster.

This is the release note: https://developers.arcgis.com/javascript/latest/4.19/#performance-improvements

If you need to disable this behavior for some reason then you can read how from this post: https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/arcgis-4-2x-now-much-slower-to-fe...