Performance
What is TTFB (Time to First Byte)?
TTFB measures the time between the browser request and receiving the first byte from the server.
TTFB (Time to First Byte) measures web server responsiveness.
Targets
- ●Good: < 200ms
- ●Acceptable: 200-500ms
- ●Poor: > 500ms
How to improve
- ●Use a CDN
- ●Optimize database queries
- ●Implement server-side caching
SEO Impact
Slow TTFB delays all other performance metrics.
Related Terms
What are Core Web Vitals?
Core Web Vitals are 3 Google metrics measuring the speed, responsiveness, and visual stability of a web page.
What is CLS (Cumulative Layout Shift)?
CLS measures a page's visual stability. A poor CLS means elements move around during loading.
What is LCP (Largest Contentful Paint)?
LCP measures the loading time of the largest visible element on a page. Target: under 2.5 seconds.
What is Page Loading Speed?
Loading speed measures the time needed to fully display a web page. It's a Google ranking factor.
What is Lazy Loading?
Lazy loading is a technique that delays loading images and videos until they're visible on screen.
What is Google Lighthouse?
Lighthouse is a Google tool that audits a web page's performance, accessibility, SEO, and best practices.