Cloudflare Cuts 100 TB of Memory from 1.1.1.1 DNS Cache

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Posted on Wed Sep 23 2026 | 6:52 pm

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.

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