Skip to content
Sign In Get Started

ttfb

  1. Measuring TTFBMeasuring TTFBTTFB is how long until the first byte arrives. Measure cached LiteSpeed hits, uncached PHP, and CDN edges separately so you fix the right layer.Updated Aug 29, 2026
  2. TTFB is not LCPTTFB is not LCPTTFB is when the first byte arrives. LCP is when the largest content paints. Measure both, because a fast edge response will not fix a heavy hero image.Updated Aug 29, 2026