JSON as Fast as Binary
JSON as Fast as Binary launched on April 8, 2015 with 12 votes, #1,133 of 3,600 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 11 years on.
In plain words
JSON as Fast as Binary is a data serialization tool that aims to provide JSON-like functionality with performance comparable to binary formats. Launched in 2015, the project is designed for developers who need efficient data interchange without sacrificing the readability of JSON. It stands out by attempting to bridge the gap between human-readable formats and high-speed binary serialization, making it useful for applications where both performance and data clarity matter.
written from the facts on this page · September 2026
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Serialization framework with some interesting numbers: 10-20x faster on nested objects than json/protobuf. Technical approach: compile-time codegen (no reflection), compact binary protocol with meta-packing, little-endian layout optimized for modern CPUs. Unique features that other fast serializers don't have: - Cross-language without IDL files (Rust ↔ Python/Java/Go) - Trait object serialization (Box) - Automatic circular reference handling - Schema evolution without coordination Happy to discuss design trade-offs. Benchmarks:…
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