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Slow load times kill user experience. You fix this by using code splitting. This method delays non-critical JavaScript until the user needs it.
Use these three strategies to improve performance:
- Route-based splitting: Load code only when a user visits a specific page.
- Component-based splitting: Load heavy components only when they appear on screen.
- Library splitting: Separate large vendor files from your main application logic.
React.lazy and Suspense make route and component splitting easy. For libraries, use vendor chunk separation or module federation.
Follow these rules to build better systems:
- Start simple. A working simple solution beats a complex broken one.
- Define success first. Know your requirements before you write code.
- Test everything. Cover normal paths and edge cases with automated tests.
- Measure before you optimize. Use real data to find bottlenecks. Do not guess.
- Avoid over-engineering. Do not build for scale you do not need yet.
- Document your choices. Write down why you made technical decisions.
Complexity is the enemy of reliability. Keep your systems simple so your team can debug and change them easily.
Your task for this week:
Audit your current React apps. Find one area where large bundles slow down your load time. Pick one small improvement and implement it.