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ttfb.sh

Measures time-to-first-byte in seconds, for single or multiple URLs. Can calculate fastest, slowest & median TTFB values, and optionally log all response headers. Uses curl and the calculation `%{time_starttransfer} - %{time_appconnect}` which doesn't include any connection overhead, to better approximate devtool’s TTFB figure.

How to download and setup ttfb.sh

Open terminal and run command
git clone https://github.com/jaygooby/ttfb.sh.git
git clone is used to create a copy or clone of ttfb.sh repositories. You pass git clone a repository URL.
it supports a few different network protocols and corresponding URL formats.

Also you may download zip file with ttfb.sh https://github.com/jaygooby/ttfb.sh/archive/master.zip

Or simply clone ttfb.sh with SSH
[email protected]:jaygooby/ttfb.sh.git

If you have some problems with ttfb.sh

You may open issue on ttfb.sh support forum (system) here: https://github.com/jaygooby/ttfb.sh/issues