> There is no single metric that conveys > the user experience (or performance) True. But if you need to pick one, TTFB isn't as good as something like Sp

> There is no single metric that conveys > the user experience (or performance) True. But if you need to pick one, TTFB isn't as good as something like Speed Index [1]. Getting your TTFB down will usually help you get your content in front of the user faster by, as you say, giving it a head-start on external resources, but that will also show up in the Speed Index. [1] https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index https://sites.google.com/a/webpagetest.org/docs/using-webpag...