Improve performance of the map for large surveys - #3870
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…nly features in the viewport are drawn
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #3870 +/- ##
============================================
+ Coverage 67.70% 67.99% +0.28%
- Complexity 1859 1877 +18
============================================
Files 411 411
Lines 10857 10870 +13
Branches 1425 1425
============================================
+ Hits 7351 7391 +40
+ Misses 2767 2737 -30
- Partials 739 742 +3
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Towards #3866
The performance of large surveys while in the home screen map was bad and could lead to OOM crashes. This was because every LOI outline was handed to the google maps sdk as soon as the survey loaded, just marked as invisible.
This PR changes that so clusterable items are added to the cluster manager but not to the map. Their outlines are created only when the clusterer decides to draw them individually, and released again once they're absorbed back into a cluster.
Additionally, the algorithm of the cluster manager was set as
NonHierarchicalViewBasedAlgorithmso that only on-screen features are drawn. This is important especially past theCLUSTERING_ZOOM_THRESHOLD, where all polygons would uncluster and render regardless if they were visible or notBefore:
screen-20260804-235913.mp4
After:
Screen_recording_20260805_190515.webm
@shobhitagarwal1612 PTAL?