Make JavaScript Faster - Techniques for Optimizing Performance

Explore cutting-edge techniques for optimizing JavaScript performance in this 41-minute conference talk from performance.now() 2018. Learn how to measure and improve JavaScript's impact on your site using the User Timing Spec and Long Tasks API, move expensive operations off the main thread, leverage code coverage tools to reduce JavaScript footprint, and understand the advantages of defer over async for script loading. Gain insights into performance metrics, browser evolution, and the increasing importance of JavaScript optimization in modern web development. Discover practical strategies to enhance site speed and user experience through effective JavaScript management.

Introduction
Knuth quote
HTTP Archive
Performance Metrics
Ageism
Ie7 2007
IE8 2008
Browser Scope
Preloader
Async
New York Times
Async Adoption
Why Do Scripts Jump in May
Linkrel Preload
CPU
Third Party
Gzip
Code Coverage
Conclusion