Every Millisecond Counts - Performance & UX

Explore performance optimization techniques for web applications in this PHP UK Conference talk. Learn how to enhance user experience through improvements at every layer of the stack, from backend to browser. Discover the impact of milliseconds on user engagement and revenue. Delve into topics such as EdgeSide Includes, image compression, perceptual quality, structural similarity for images, predictive browsing, DNS prefetch, link rel preconnect, prerender, preload headers, and HTTP/2 Server Push. Understand the importance of time in relation to money, ads, compression, prefetching, and HTTP/2 upgrades. Examine compression engines, browser support, security implications, and benchmarks for transitioning from HTTP to TLS.

Introduction
Why does performance matter
Conclusions
What makes a web page
How do we fix this
Using the Speed Index
Edgeside Includes
Image Compression
Perceptional Quality
Structural Similarity for Images
Image Size Comparison
Predictive Browsing
DNS Prefetch
Linkrel
Preconnect
Prerender
Preload
Header
HTTP 2 Server Push
Summary
Time equals money
Ads
Compression
Prefetching
HTTP2 Upgrade
Compression Engines
Browser Support
Prefetch
DSS IM
Security Implications
Benchmarks
HTTP to TLS