WeAreDevelopers Logo WeAreDevelopers
Sign in
For You LIVE
World Congress 2025 • Aug 20, 2025 • Session details

HTTP headers that make your website go faster

Thijs Feryn

Stop overloading your origin servers with redundant data payloads. Mastering HTTP caching headers unlocks precise bandwidth control and instantly accelerates your website's performance.

Pause
Mute Enter Fullscreen
#1 about 3 min

Introduction to web acceleration and caching paradigms

Modern web platforms require scalable caching to accelerate websites, APIs, and build pipelines.

#2 about 3 min

Protecting origin servers using reverse caching proxies

Placing an intermediary proxy layer in front of application servers prevents system overload.

#3 about 2 min

Transitioning from expires to cache-control headers

Replacing deprecated timestamp caching methods with rich directive headers grants greater programmatic control.

#4 about 3 min

Distinguishing between public and private cache configurations

Setting headers to public or private safely directs where proxies or user browsers store specific responses.

#5 about 3 min

Targeting shared proxy caching layers with s-maxage

Employing specialized TTL instructions sets independent expiration timers for application edges versus client local storage.

#6 about 4 min

Conditional requests and entity fingerprinting with ETags

Evaluating content hashes stops redundant payload transfers when requested data has not fundamentally changed.

#7 about 2 min

Optimizing backend resources via early cache validation

Evaluating conditional request headers before fully bootstrapping internal application logic reduces compute, memory, and database stress.

#8 about 3 min

Maintaining uptime during outages using stale-while-revalidate

Serving slightly expired content via background refresh patterns masks service errors and system connection latency.

#9 about 3 min

Enforcing data freshness and strict edge transformation boundaries

Stringent directives force synchronous validation and prohibit arbitrary alteration by transit networking proxies.

#10 about 1 min

Preventing sensitive data persistence using no-store

Bypassing cache systems completely avoids exposing private user interactions onto publicly shared environments.

#11 about 3 min

Segmenting object identities using HTTP vary headers

Differentiating content based on user language preferences avoids incorrectly substituting diverse cached interface variations.

#12 about 3 min

Managing tiered cache layers using surrogate-control headers

Implementing capabilities at delivery tiers allows granular proxy coordination distinctly partitioned from upstream origin instructions.

#13 about 2 min

Composing dynamic interfaces through edge side includes

Fragmenting static structures from user specific objects facilitates aggressive reuse on dynamic frontend application views.

#14 about 1 min

Extending HTTP behavior with custom edge configurations

Deploying custom configuration languages automates distinct routing logic beyond basic static configuration constraints.

Matching moments

7:21 min

Optimizing server response times and critical resource loading

Ines Akrap Ines Akrap · LIVE

1:51 min

Optimizing websites for high performance and energy efficiency

Roy Derks · JS Congress

2:52 min

Overcoming historical web caching and privacy challenges

Thomas Steiner · Coffee With Developers

5:43 min

Reducing rendering latency with HTTP reverse proxies

Natan Silnitsky Natan Silnitsky · World Congress 2021

6:18 min

Prioritizing max-age over expires for http response optimization

Mohamed Shiralizadeh · Coffee With Developers

4:08 min

Navigating caching and downstream throttling in event-driven setups

Marco Plaul Marco Plaul +1 · World Congress 2023

More from World Congress 2025

GenAI Security: Navigating the Unseen Iceberg thumbnail
24:33
11 months ago

GenAI Security: Navigating the Unseen Iceberg

Maish Saidel-Keesing

Behind the Code: How Women Are Powering the Future of AI thumbnail
30:28
about 1 year ago

Behind the Code: How Women Are Powering the Future of AI

Alexandra Wudel, Laura Moritz, Madalina Florean

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise? thumbnail
28:12
about 1 year ago

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise?

Justus Lumpe, Konstantin Vinogradov, Nils Eiteneyer, Stephan Wirris

AI in Leadership: How Technology is Reshaping Executive Roles thumbnail
28:19
about 1 year ago

AI in Leadership: How Technology is Reshaping Executive Roles

Bernd Datler, Jasmin Kaiser, Jeff Hausmann, Sonja Alvarez

The AI-Ready Stack: Rethinking the Engineering Org of the Future thumbnail
28:09
about 1 year ago

The AI-Ready Stack: Rethinking the Engineering Org of the Future

Alex Laubscher, Jan Oberhauser, Keno Dreßel, Mirko Novakovic

AI Sovereignty: What Does It Take? thumbnail
29:13
about 1 year ago

AI Sovereignty: What Does It Take?

Boris Hecker, Clemens Wasner, Robin Hermann, Sonja Alvarez

Upcoming sessions on this topic

Open session

World Congress 2026 North America

September 25, 2026 · 16:10–16:40

Stage 4

Speed up your CI/CD pipelines by caching build & runtime artifacts

Thijs Feryn

Technical Evangelist at Varnish Software

Thijs Feryn
Open session

World Congress 2026 North America

September 24, 2026 · 15:30–16:00

Stage 1

KV Cache Is Not About Speed: It's About Surviving Inference Costs

David vonThenen

AI/ML Leader | Keynote Speaker | OSS Engineer & Developer Advocate | Agentic AI, Deep Learning, Production AI | Python, Go, C++

David vonThenen
Open session

World Congress 2026 North America

September 25, 2026 · 15:30–15:40

Outdoor Stage

Offloading IoT State: Solving the Memory Crisis on Legacy Hardware

Pravin Nagare

Senior Software Engineer, Roku

Pravin Nagare
Open session

World Congress 2026 North America

September 24, 2026 · 14:50–15:20

Stage 9

How to generate business value through performance optimizations

Nikolai Sidiropulo

Software Engineer at Meta

Nikolai Sidiropulo
Open session

World Congress 2026 North America

September 24, 2026 · 14:10–14:40

Stage 7

Designing High-Performance AI APIs: Lessons from Serving Millions of Real-Time Requests

Wayne Liu

Chief Growth Officer and Americas President of Perfect Corp.

Wayne Liu
Open session

World Congress 2026 North America

September 24, 2026 · 12:50–13:20

Stage 7

Architecting AI in Angular: WebMCP, A2UI, and the Agent Experience

Ankita Sood

Sr. Principal Engineer @ Secureworks | Angular GDE

Ankita Sood

Related videos

Advanced Caching Patterns used by 2000 microservices thumbnail
44:37
World Congress 2021 • about 5 years ago

Advanced Caching Patterns used by 2000 microservices

Natan Silnitsky

Catching up on the basics you don't really need that much code thumbnail
14:44
LIVE • over 2 years ago

Catching up on the basics you don't really need that much code

Chris Heilmann

Sleek, Swift, and Sustainable: Optimizations every web developer should consider thumbnail
29:14
World Congress 2024 • about 2 years ago

Sleek, Swift, and Sustainable: Optimizations every web developer should consider

Andreas Taranetz

Offline first! thumbnail
35:53
World Congress 2023 • about 3 years ago

Offline first!

Rowdy Rabouw

Speed up your CI/CD pipelines by caching build & runtime artifacts thumbnail
29:08
World Congress 2026 Europe • about 2 months ago

Speed up your CI/CD pipelines by caching build & runtime artifacts

Thijs Feryn

3x Performance: A Humbling Journey thumbnail
27:18
World Congress 2026 Europe • about 2 months ago

3x Performance: A Humbling Journey

Luca Trușcă

Related articles

From learning to earning

Jobs that call for the skills explored in this talk.