webgl layer.getFeatures Unimplemented

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#17,288 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
32/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Quiet
Tech stack
javascript
Domain
frontend, performance, web-dev

Research direction

The issue names map.forEachFeatureAtPixel and layer.getFeatures(), but no source file or test. Start by tracing those APIs in the OpenLayers source and reproducing the throttled pointermove case with OL 10.7 in Chrome 143. Done is undefined until a specific performance fix or getFeatures implementation is agreed.

Written by the indexing model from the issue text.

Description

feature request

I’m using map.forEachFeatureAtPixel inside a throttled pointermove event handler to retrieve features at a pixel.

Even with throttling, I still see [Violation] 'setTimeout' handler took ms warnings, and there is noticeable lag when dragging or panning the map.

I attempted to use layer.getFeatures() instead, but it’s not implemented in this context.

Are there recommended alternatives to forEachFeatureAtPixel for better performance?

I'm using OL 10.7 and Chrome 143

Dominant language
JavaScript
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Merged PRs (30d)
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