Use The Index, Luke! : A tutorial covering SQL indexing and SQL tuning for developers: avoiding unnecessary details about database internals.
SQL indexing is the most effect...
MySQLTuner : MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stabi...
High Performance Browser Networking : Performance is a feature. This book provides a hands-on overview of what every web developer needs to know about the various types of networks (WiFi, ...
Phinx : Phinx makes it ridiculously easy to manage the database migrations for your PHP app. In less than 5 minutes you can install Phinx and create your firs...
Blackfire : Blackfire Profiler automatically instruments your code to gather data about consumed server resources like memory, CPU time, and I/O. But Blackfire Pr...
Vitess is a database clustering system for horizontal scaling of MySQL.
Minimize round-trip times : An article on the best practices to apply in order to minimize HTTP round-trip times
Let's make the web faster : There are many ways to make websites run faster. In this section, you can discover performance best practices that real web professionals employ in th...
Beego : An open source framework to build and develop your applications in the Go way
Phalcon PHP : Phalcon is a web framework implemented as a C extension offering high performance and lower resource consumption.
Pyramid : Pyramid is a very general open source Python web framework.
Nice write-up on techniques for scaling up a web application.