Alex Gaynor 6/20/2025

So you want to serialize some DER?

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The article explores the technical details of serializing data using the DER (Distinguished Encoding Rules) format, a binary TLV (type-length-value) encoding. It discusses the challenges of variable-length encoding, specifically for INTEGER types, and describes the optimization journey within the author's Rust library, rust-asn1, to improve performance by pre-computing value lengths.

So you want to serialize some DER?

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