Details

1. Ran a frontend performance study group and defined an improvement plan
   • Conducted a month-long study group outside work hours using the book "Frontend Performance Optimization Guide"
   • Selected measurable metrics to track improvements (Chrome LightHouse score)
   • Compiled a list of applicable performance improvements for the current site based on study learnings; distributed tasks among study group members
2. Executed performance improvements
   • Reduced JS bundle size: optimized libraries such as lodash and framer, migrated date library from moment to dayjs, updated import patterns
   • Optimized animations: removed or modified animations causing reflow/repaint; reduced scroll event overhead with Intersection Observer
   • Applied image size optimization and lazy loading
   • LightHouse score increased by 11% over 2 months