Free guide
TTFB Optimisation Guide
How to measure Time to First Byte properly, find where the time goes, and fix it. Covers DNS, TLS, CDNs, PHP-FPM, OPcache, page and object caching, slow queries, and platform notes for WordPress, WooCommerce, Magento and custom apps.
PDF · 13 pages · Updated October 2026
For: Developers and technical owners of WordPress, WooCommerce, Magento and custom sites.
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What’s inside.
- What TTFB is and why it matters
- Measuring it
- Where the time goes
- Network fixes
- Server fixes
- Application and database fixes
- Platform notes
- A worked example
- Checklist
What you’ll be able to do.
- Measure Time to First Byte properly: cached and uncached, logged in and out.
- Find where the time goes: DNS, TLS, redirects, application code or the database.
- Tune PHP-FPM, OPcache, page caching and Redis object caching.
- Find and fix slow queries and slow plugins or extensions.
- Follow a worked diagnosis from first measurement to fix.
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