"TLS has exactly one performance problem: it is not used widely enough. Everything else can be optimized."
"Browserscope is a community-driven project for profiling web browsers. The goals are to foster innovation by tracking browser functionality and to be a resource for web developers."
"cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of health"
Dstat is a versatile replacement for vmstat, iostat, netstat and ifstat.
Glances is a CLI curses based monitoring tool for GNU/Linux and BSD OS
Fork of http://www.acme.com/software/thttpd/
Cf. https://github.com/daniel-nichter/hackmysql.com/tree/master/mysqlreport (2017-09-01)
Test the load time of a web page
Iotop is a Python program with a top like UI used to show of behalf of which process is the I/O going on ... [evaluating] (the bi and bo columns of the vmstat 1 command).