Online tools for website performance and scaling

— November 18, 2014 — Performance Budget Metrics Yesterday, Chris Coyier pondered aloud the best metric to use for a performance budget …

We've already covered the different techniques you could use to vastly improve the performance of your front-end applications, their page load time, and the perceived [...]

This article aims to cover the performance gains I've attained in the redesign of Pony Foo, deployed last week to production. I'll be covering a few different topics [...]

Internet Explorer Internals and Developer Information

turbolinks - Turbolinks makes following links in your web application faster (use with Rails Asset Pipeline)

Specifically: advices on loading third party JS :
third-party script is slowing down your page load, you have several options to improve performance:

• Load the script using the async or defer attribute to avoid blocking document parsing.
• Consider self-hosting the script if the third-party server is slow.
• Consider Resource Hints like <link rel=preconnect> or <link rel=dns-prefetch> to perform a DNS lookup for domains hosting third-party scripts.
• "Sandbox" scripts with an iframe
• lazy-load content after the main page content loads but before a user might otherwise interact with the page

PageSpeed Insights & Apache/nginx modules