Arcade Intersects really slow to load in dashboard

[DebHSF]

I've had this issue with a couple of different datasets now - if I try and use an Intersects function in a dashboard, it takes over 5 minutes for the dashboard widgets to load, which obviously makes it unusable for the end user.

Below is an example of the Arcade expression I have used for a table widget. The zone featureset has just 2 features, and the s_features featureset has 1500, so a decent amount but not huge. Both are polygon datasets.

Any suggestions of alternative methods I could use to make this quicker?

// Get the datasets
var zone = FeatureSetByPortalItem(Portal('https://arcgis.com'),'<id_hidden>', 0, ['zone'], true)
 
var s_features = FeatureSetByPortalItem(Portal('https://arcgis.com'),'<id_hidden>', 1, ['HA'], true)
 
// Create new empty feature set
var new_fs = {
    'fields': [{'name': 'Zone', 'type': 'esriFieldTypeString'},
    {'name': 'Number', 'type': 'esriFieldTypeInteger'}],
    'geometryType': '',
    'features': []
}
 
// Tell it what will be contained in each field
for (var z in zone) {
    var intersectArea = Intersects(s_features, z);
    var countS = count(intersectArea);
    var new_zone = z['zone']
    Push(new_fs.features, {'attributes': {'Zone': new_zone, 'Number': countS}})
}

// Create new feature set
var zone_count = FeatureSet(Text(new_fs))

return zone_count

[MichaelVolz]

Can you run a geoprocess on a regular interval to create this data instead of using a runtime Arcade expression?  This might greatly reduce the load time.

[DebHSF]

Thanks, yes that's the next option if I can't speed up the Arcade. It's a regularly updated dataset so was hoping to avoid a manual process or auto-run script.