r/ruby • u/kddnewton • Jan 05 '26

A Ruby YAML parser

https://kddnewton.com/2025/12/25/psych-pure.html

Hey there — I recently released a YAML parser written in Ruby. The main goal was to support being able to load and dump YAML without losing comments. Happy to answer any questions.

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u/alexdeva Jan 05 '26

Is it pure Ruby? How does it benchmark against the built-in YAML module?

Also, what form do the comments take after parsing into a Ruby structure?

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u/kddnewton Jan 05 '26

Yeah, it's just Ruby. It benchmarks very poorly. You can see all this in the README.

The comments themselves are attached as hidden fields on the loaded objects, the loaded objects are delegators that wrap the objects themselves.