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First Byte Time
08-27-2012, 10:33 PM
Post: #5
RE: First Byte Time
The TTFB Target is something that WPT calculates. It tries to set the target so that your server can spend 100ms doing the actual processing and you will still get an A and then it drops a letter grade for every 100ms after that.

It uses the socket connect time as a proxy for the RTT to the server and effectively allows for that much time + 100ms for the first byte after the request has been sent (the overall TTFB includes DNS and SSL negotiation which are also added in).

You can pretty much assume that anything over a second will fail given the letter-grade per 100ms fall-off. The target not showing up is probably a bug - if you can send me a ling to the result I can look into it.
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Messages In This Thread
First Byte Time - rhoward - 08-16-2012, 10:29 AM
RE: First Byte Time - pmeenan - 08-17-2012, 11:54 PM
RE: First Byte Time - namon96 - 08-19-2012, 06:06 AM
RE: First Byte Time - briangr - 08-24-2012, 12:55 AM
RE: First Byte Time - pmeenan - 08-27-2012 10:33 PM

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