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#react-compiler

2 stories

Web Development Bug Report

React Compiler silently skipped our slowest component: mutation during render and bail-outs

Hannah Okafor · Jan 6, 2026 · 7 min read

After enabling React Compiler we removed our manual useMemo calls, and the order table became slower than before. The compiler had bailed out of that component because it mutated an array during render. How we found which components were compiled, fixed the rule violations and verified the result.

Banner: a single React context provider triggering re-renders across a whole component tree

Web Development Bug Report

React context re-render storm: every keystroke re-rendered 600 components

John Nguyen · Nov 4, 2025 · 10 min read

Typing in our search box felt sticky, with INP above 400 ms on mid-range laptops. The React Profiler showed the entire product grid re-rendering on every keystroke because one app-wide context held both slow and fast-changing state. Splitting contexts and a selector store cut that to a handful of renders.