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Juun

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007Sep 2025
PERFORMANCE

Resium Removal: Native Cesium

Removed Resium wrapper library (-1MB), implemented direct Cesium integration with custom React wrapper

CesiumReactbundleoptimizationperformance

Situation

Using Resium (React wrapper for Cesium) added 1MB to the bundle. Only using Resium's basic Viewer component, others were redundant. Additionally, Resium's declarative abstractions are not appropriate for dynamic scenes.

Task

  • Remove Resium dependency

Action

Implemented native component

  • Created custom viewer component with forwardRef
  • Direct Cesium API usage
  • Maintained React-friendly interface

Result

Reduced bundle size by 1 MB (significant for FCP) and gained full control over Cesium APIs.

Created
September 19, 2025