10 Data-Backed Techniques to Reduce JavaScript Bundle Size by 15-70%

Short summary

Reduce JavaScript bundle size by up to 70% using 10 proven techniques: tree shaking (15-25%), code splitting (20-35%), compression with Brotli (24% ratio), and dependency auditing. A real case reduced LCP from 4.2s to 2.8s. Apply incrementally with Lighthouse and webpack-bundle-analyzer to measure results.

• •10 techniques ordered by impact; tree shaking and code splitting offer highest reduction
• •Real case study: optimization reduced LCP from 4.2s to 2.8s with 28% bundle reduction
• •Specific tools and before/after metrics provided for tracking progress

Generated with AI, which can make mistakes.