WordPress Caching Explained: Performance and Optimization

Caching is a critical performance optimization that significantly reduces server load and improves user experience by serving static content.

Based on 4 community reports.

Linked sources: 4.

Known Issues

• Conflicts with dynamic booking plugins
• Misinterpretation of TTFB metrics
• Over-reliance on page speed tools

Community Q&A

What is WordPress caching?

Caching stores static versions of your website pages to reduce server processing time and speed up delivery to visitors.

Does caching affect dynamic content like bookings?

Yes, aggressive caching can cause issues with dynamic plugins like booking systems, often requiring specific exclusion rules.

How does TTFB relate to caching?

Time to First Byte (TTFB) is often improved by caching because the server spends less time generating the page from scratch.

Reddit Sources

• 6 simple tips that helped me get better at using WordPress (r/Wordpress)
• Asked to audit another Dev’s site; found potentially serious security issue. Is this as bad as I think? How do I disclose this to the client without rocking the boad; other dev lied and said she fixed it? (r/ProWordPress)
• Amelia Booking plugin errors: Missing bookings, SMTP fields and Days Off not saving (r/Wordpress)
• Are Thousands of WordPress Users Being Misled by PageSpeed on Performance? (r/Wordpress)