SEP 1, 2026

When "idle" isn't idle: how a Linux kernel optimization became a QUIC bug

We investigated a bug where CUBIC's congestion window became pinned at its minimum floor, causing a performance to plummet. The fix involved correctly...

Performance Linux kernel QUIC CUBIC Networking Optimization Linux Kernel Optimization

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Introducing Adaptive Intelligence: undermining the economics of every bot attack

Bot operators have historically had the economic advantage, bypassing static, deterministic detection rules with cheap proxies and retooling. Cloudflare's new...

NetworkingSecurity

1 min

Cloudflare3d ago

BotBase for Operators: A clearer path to joining Cloudflare's directory of bots and agents

Bot operators now have a home in the Cloudflare dashboard to manage submissions. This update adds submission status tracking, submission editing, and a...

NetworkingSecurity

1 min

Weekly Brief

Top 10 engineering articles delivered every Monday.

Cloudflare4d ago

How we saved 100 terabytes of memory by optimizing 1.1.1.1’s DNS cache

Five Rust-level memory optimizations to the DNS cache layout of Big Pineapple cut per-entry memory by 56%, freeing approximately 100 TB of memory across...

NetworkingSecurity

1 min