Website Performance Checklist for 2026

Speed is still a conversion issue

People leave slow pages before they read your offer. If your team spends on ads, performance is not a nice-to-have. It is part of your CAC efficiency.

Weekly checks that keep sites fast

1. Compress and resize all new media before publish
2. Review third-party scripts and remove dead tags
3. Monitor Core Web Vitals on real pages, not test pages only
4. Check mobile performance after every major update

The hidden source of slowdown

Most regressions come from small changes over time: one script, one oversized image, one new animation. None looks dangerous alone. Together they hurt UX.

What to track by default

• LCP for loading perception
• INP for interaction quality
• CLS for visual stability

If your pages are getting heavier each month, you need a clear performance owner and a release checklist. Kodefy can help you set both quickly.