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

Cloudflare Blog · Official source · Aug 27, 2026, 5:02 PM UTC

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

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