Start with a user-facing performance baseline
The compiler optimizes how React derives and reuses UI, so its value is most visible in interfaces that re-render frequently: dense forms, data grids, dashboards, search results, and interactive editors. Before changing a build setting, identify the slow journeys and record a baseline. Otherwise, a successful installation can look like a successful performance project even when users feel no difference.
Journey metric
Choose a task such as filtering a table, opening a detail panel, or typing into a complex form. Record the interaction delay and completion rate.
Render evidence
