Category: Web Performance

All categories

2026

1. September 09
   Web-Perf Wednesday 008 – Good INP Rates Keep Falling
2. September 02
   Web-Perf Wednesday 007 – Chrome Makes Busy Workers Measurable
3. August 26
   Web-Perf Wednesday 006 – Faster Browser Releases Change Your RUM Population
4. August 20
   Unattributed Navigation Overhead (UNO) Is Underrated
5. August 19
   Web-Perf Wednesday 005 – RUM Needs More Than a Percentile
6. August 18
   Introducing LUX Sidecar: Your SpeedCurve Companion
7. August 17
   When Safari’s ‘Ignore Cache’ Ignored Cache-Control
8. August 12
   Web-Perf Wednesday 004 – A Quiet Week Is Time to Investigate
9. August 05
   Web-Perf Wednesday 003 – Native SPA Metrics Have Arrived
10. July 29
    Web-Perf Wednesday 002 – The Metrics Don’t Tell the Whole Story
11. July 26
    Measuring Component Performance with the Container Timing API
12. July 21
    Low- and Mid-Tier Mobile for the Real World (2026)
13. July 15
    Web-Perf Wednesday 001 – SPAs Are Finally Becoming Measurable
14. June 01
    Front-End’s Missing Metric: The TBT Window
15. May 12
    Meet Your Users Where They Are with Obs.js
16. May 07
    Better Browser Caching with No-Vary-Search
17. April 02
    What Is CSS Containment and How Can I Use It?
18. March 30
    When All You Can Do Is All or Nothing, Do Nothing

2025

1. August 27
   Obs.js: Context-Aware Web Performance for Everyone
2. August 18
   Low- and Mid-Tier Mobile for the Real World (2025)
3. July 27
   The Fastest Site in the Tour de France
4. July 25
   Making Sense of the Performance Extensibility API
5. March 07
   Why Do We Have a Cache-Control Request Header?

2024

1. December 02
   A Layered Approach to Speculation Rules
2. November 26
   Designing (and Evolving) a New Web Performance Score
3. November 18
   Core Web Vitals Colours
4. September 16
   Optimising for High Latency Environments
5. August 19
   Cache Grab: How Much Are You Leaving on the Table?
6. August 14
   blocking=render: Why would you do that?!

2023

1. December 09
   Correctly Configure (Pre) Connections
2. October 17
   The Three Cs: 🤝 Concatenate, 🗜️ Compress, 🗳️ Cache
3. October 16
   What Is the Maximum max-age?
4. October 02
   How to Clear Cache and Cookies on a Customer’s Device
5. September 28
   The Ultimate Low-Quality Image Placeholder Technique
6. July 24
   Core Web Vitals for Search Engine Optimisation: What Do We Need to Know?
7. July 11
   The HTTP/1-liness of HTTP/2
8. July 01
   In Defence of DOM­Content­Loaded
9. June 07
   Site-Speed Topography Remapped
10. January 10
    Why Not document.write()?

2022

1. October 12
   Speeding Up Async Snippets
2. September 06
   Critical CSS? Not So Fast!
3. August 24
   Measure What You Impact, Not What You Influence
4. March 28
   Optimising Largest Contentful Paint

2021

1. February 26
   Measuring Web Performance in Mobile Safari

2020

1. November 03
   Site-Speed Topography
2. May 19
   Speed Up Google Fonts
3. April 22
   Real-World Effectiveness of Brotli
4. January 08
   Performance Budgets, Pragmatically

2019

1. August 15
   Lazy Pre-Browsing with Prefetch
2. August 13
   Making Cloud.typography Fast(er)
3. August 08
   Time to First Byte: What It Is and How to Improve It
4. May 31
   Self-Host Your Static Assets
5. March 04
   Cache-Control for Civilians
6. January 31
   Bandwidth or Latency: When to Optimise for Which

2018

1. November 23
   What If?
2. November 09
   CSS and Network Performance
3. October 27
   The Three Types of Performance Testing
4. June 11
   Image Inconsistencies: How and When Browsers Download Images
5. May 21
   Identifying, Auditing, and Discussing Third Parties
6. March 01
   Measuring the Hard-to-Measure
7. January 17
   Finding Dead CSS

2017

1. November 21
   The Fallacies of Distributed Computing (Applied to Front-End Performance)
2. July 31
   Performance and Resilience: Stress-Testing Third Parties
3. February 12
   Base64 Encoding & Performance, Part 2: Gathering Data
4. February 12
   Base64 Encoding & Performance, Part 1: What’s Up with Base64?
5. January 25
   Moving CSS Wizardry onto HTTPS and HTTP/2
6. January 04
   Choosing the Correct Average

2016

1. October 23
   Improving Perceived Performance with Multiple Background Images
2. February 25
   Mixins Better for Performance