Performance Tuning with AI: For Humans, Not Wizards

Fast feels good. You don’t need dark magic—just a few steady steps and honest measurement.

Start with the user

• Pick one slow page or action
• Measure load time and interaction time
• Write down a tiny goal (e.g., “-300ms on first paint”)

Ask AI for ideas

• “List 3 small changes that reduce JS size or work on this page.”
• “Explain what blocks rendering here.”
• “Suggest one caching improvement and a safe way to test it.”

Change, measure, commit

• Make one change
• Measure again with the same method
• If it helps, keep it; if not, revert

Common wins

• Smaller images
• Less blocking JS/CSS
• Cache headers on static assets

Pitfalls

• Big complex rewrites without data
• Optimizing what users don’t feel
• Mixing many changes in one PR

Takeaways

• Small step, measure, decide
• AI suggests; you verify with numbers
• Focus on what users feel first