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

calendar_today August 27, 2026 person Sebastiaan Neuteboom domain cloudflare

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 Cloudflare’s fleet.

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