TTFB stands for "time to first byte", a metric that indicates the time elapsed between the time a remote computer establishes a connection to a website and the time the first byte of data is sent back to the remote computer. This is often measured in milliseconds.

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More apache processes = higher TTFB = lower money? why?

I just upgraded my server from 8 GB ram to 16 GB ram. I then adjusted my apache settings to serve more users at a time including mobile. Yes I'm still on prefork mode because I created a module and I'...
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Is webpagetest.org unreliable with mobile testing? I'm trying to get accurate results

I use webpagetest.org to test my website very often. When I used a couple of remote desktop computers on their site, my TTFB (time to first byte) measures between 1 and 400ms. However, on nearly all ...
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Which does google prefer: chained redirects or longer time-to-first-byte?

I'm clearly a webpagetest.org addict now. Once again, I tested my site after optimizing (by eliminating some file scans) and the speed greatly improved. It's now at about 150ms Time to First Byte from ...