Hacker News: t_null

Erxi or how I learned to love the fast testing suite

t_null — Fri, 20 Feb 2026 10:52:26 +0000

Article URL: https://hahn.website/blog/erxi/

Comments URL: https://news.ycombinator.com/item?id=47086336

Points: 1

# Comments: 0

New comment by t_null in "Show HN: Erxi – A Fast EXI (Efficient XML Interchange) Implementation in Rust"

t_null — Thu, 19 Feb 2026 13:47:14 +0000

I built *erxi*, a Rust implementation of *EXI* (W3C Efficient XML Interchange)

Write-up with benchmarks and context: https://hahn.website/blog/erxi

Main goal: XML/EXI interoperability with good performance and memory usage, without requiring a JVM runtime.

Current status: - Rust encoder/decoder with interoperability testing - Big improvements over my initial versions in runtime and memory - EXI4JSON implementation (JSON workflows can be bridged into EXI) - Good baseline for further tooling

Next thing I’m considering is where to focus next. Would you prefer:

1. *Visualization/translator tooling* XML/JSON <-> EXI with a debuggable event/structure view.

2. *More of the XML stack in Rust* XML parsing, XSD parsing, validation, etc.

If you had to pick one first, which would you want and why?

Show HN: Erxi – A Fast EXI (Efficient XML Interchange) Implementation in Rust

t_null — Thu, 19 Feb 2026 13:47:14 +0000

Article URL: https://github.com/schachmadinejad/erxi

Comments URL: https://news.ycombinator.com/item?id=47073659

Points: 1

# Comments: 1

New comment by t_null in "Ask HN: What are you working on? (February 2026)"

t_null — Sun, 08 Feb 2026 23:40:38 +0000

Ah yeah, and also a suite of web games/apps in rust wasm all based around collaborative creativity. The one for collaborative storytelling is most mature, currently playtesting with friends.

New comment by t_null in "Ask HN: What are you working on? (February 2026)"

t_null — Sun, 08 Feb 2026 23:36:55 +0000

An exi decoder/encoder (goal is to have modes for spec conform and interop, which right now doesn't seem to be the same thing). Afterwards I also want to try to use it to encode huge XML datasets in precomp mode with good encoder (maybe ztsd). Should be pretty useful for large repetitive datasets. I also want to build a tool to visualize XML to exi de/encoding in the browser.

New comment by t_null in "Ask HN: What are you working on? (February 2026)"

t_null — Sun, 08 Feb 2026 23:34:45 +0000

An exi encoder/decoder in rust (spec conform and interop, which right now doesn't seem to be the same thing) / afterwards I also want to do a visualization of XML to exi and reverse translation.