Kore - Binary File Format
50x faster than JSON, 50-70% smaller. 6 language bindings.
What it does
Binary format for modern data systems. Parse 100MB in 50ms (vs JSON 3000ms). 50-70% smaller files. Type-safe: Python, Java, JS, Go, C#, Ruby. Production benchmarks: 20x faster logs, 64% size reduction. Zero deps. VS Code extension included.
Does a similar job
all alternatives →- AFApache Fory Rust – 10-20x faster serialization than JSON/ProtobufOct 2025 · fory.apache.org · ▲67
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:…
- JAJSON as Fast as Binary2015 · hperadin.github.io · ▲12
- JFJSON For You – Visualize JSON in graph or table views2024 · github.com · ▲211
After two years of improvement, I think it's time to share it with you all. Here’s a quick overview: - Common features include validation, formatting, minification, and more. - Visualize JSON in a graph or table view. - Structured comparison with fallback to text comparison. - Navigate though JSON using JSON pointer. - Supports jq. Would love to hear the community's questions, thoughts and comments!
- UJuDSV.js – A faster CSV parser2023 · github.com · ▲67
Hey folks! I know CSV parsers (especially in JS) aren't terribly exciting and someone writes a "better" one every week. I'm in the middle of my parental leave, and this was a project that came out of me looking for the fastest/smallest CSV parser. It all started so innocently, and then turned into a benchmark-validation-athon; the library itself took ~2 weeks to write, but the performance comparisons took another ~4 weeks (on and off). The benchmarks were a huge effort, but I think they are the most thorough to date, both in breadth and in depth, so hopefully you find them useful:…
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