modulepreload in 2026: Fix ES Module Waterfalls and Cut LCP for Native ESM
rel=modulepreload fetches, parses, and compiles ES modules ahead of time, populating the module map so import() resolves instantly and LCP drops by hundreds of ms.
JavaScript Performance Articles
scheduler.yield(): Break Up Long Tasks the Right Way and Fix INP in 2026
scheduler.yield() is the modern way to break up long JavaScript tasks and fix INP. Learn the patterns, the comparison to setTimeout and postTask, and a production-ready fallback.