InfoQ - Cloudflare

Cloudflare Adds Configurable HTTP Vary Header Support to Prevent Cache Thrashing

Olimpiu Pop — Tue, 29 Sep 2026 14:14:00 GMT

Cloudflare has implemented native support for the HTTP Vary header across its edge network, enhancing cache management for all customer plans. This feature allows for better negotiation of content representations while minimizing cache fragmentation. Operators can define specific behaviors for request headers, enabling greater control over caching efficiency and reducing server load.

By Olimpiu Pop

Cloudflare Worker Previews: Per-Branch Environments for Workers

Claudio Masolo — Tue, 29 Sep 2026 09:00:00 GMT

Cloudflare has introduced Worker Previews. This feature allows each Git branch to have its own isolated, production-like environment for a Worker. Each environment has a stable URL. It also has its own configuration and unique state for each branch. Plus, there’s scoped observability.

By Claudio Masolo

Python Workers Reach GA on Cloudflare, with Questions About Cold Starts and Upstream Maintenance

Steef-Jan Wiggers — Tue, 29 Sep 2026 06:33:00 GMT

Cloudflare has made Python Workers generally available, built on PEP 783 and on socket syscalls implemented over the Workers connect API. The announcement carries no performance figures. A urllib3 maintainer questioned who supports the upstream work afterwards, and Wasmer's founder asked for cold-start numbers, citing about 1.027 seconds from Cloudflare's own earlier post.

By Steef-Jan Wiggers

Cloudflare Details its Migration to "WordPress Successor" EmDash

Renato Losio — Sat, 26 Sep 2026 09:38:00 GMT

Cloudflare recently documented the migration of its main blog from WordPress to EmDash, the open source content management system developed internally. The new platform is designed to improve performance and caching, and it was tested to handle traffic of up to 7000 requests per second.

By Renato Losio

Cloudflare Cuts 100 TB of Memory from 1.1.1.1 DNS Cache

Leela Kumili — Wed, 23 Sep 2026 13:22:00 GMT

Cloudflare redesigned the in-memory representation of its Big Pineapple DNS cache, reducing the per-entry footprint by 56% and freeing roughly 100 TB of working-set memory across its fleet. The Rust-based changes also increased cache insertion throughput by 43% and reduced lookup latency by 19%, while enabling Cloudflare to increase cache capacity without additional memory.

By Leela Kumili

Article: Modular Edge Computing at Multi-Tenant SaaS Scale on Cloudflare Workers

Chintan Tank — Wed, 23 Sep 2026 09:00:00 GMT

At multi-tenant SaaS scale, a monolithic edge worker creates deployment coupling and broad blast radius. The article presents a modular Cloudflare Workers architecture using service bindings, with image optimization as a worked example of per-tenant format negotiation and device-aware sizing. It covers multi-CDN differences, staged releases, configuration, and testing.

By Chintan Tank

Cloudflare Measures Origin TLS Preferences, Cutting Handshake Retries from 52% to 3.7%

Steef-Jan Wiggers — Sun, 20 Sep 2026 08:15:00 GMT

Cloudflare has replaced its static X25519 guess for origin TLS handshakes with per-origin measurement. HelloRetryRequests on scanned origins fell from roughly 52% to 3.7%, removing over 150 ms from p90 latency. Post-quantum connections completing in one round trip rose from 0% to 99.2%, though only 12.8% of origins support it.

By Steef-Jan Wiggers