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ijl/orjson

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Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy

12 mentions on Hacker News by 8 people: 6 stories, 6 comments · first 2018-12-19 · latest 2026-02-15

Mentions per year 12 mentions · busiest year 2020 (3)
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  1. …it is often used as replacement of than JSON functions in core Python 3. As of Jan 29th 2026 ( https://github.com/ijl/orjson/commit/d58168733189f82b3fd0c05... ) open issue tracker or pull requests has been removed from the orjson repo due…
    comment by anutrix · 2026-02-15 · in Orjson no more open issue tracker or pull requests due to signal-to-noise ratio
  2. ▲ 3
    Orjson no more open issue tracker or pull requests due to signal-to-noise ratio
    story by anutrix · 2026-02-15 · 1 comment
  3. ▲ 2
    orjson: Fast, correct Python JSON lib supporting dataclasses, datetimes, NumPy
    story by tosh · 2024-08-20 · 1 comment
  4. …to not publish this, I'm just this evil.) I've looked into replacing ujson in pydantic with orjson (https://github.com/ijl/orjson). In this implementation, the same JSON library is used for everything, and JSON outputs bytes without…
    comment by 3r7j6qzi9jvnve · 2024-06-06 · in JSON extra uses orjson instead of ujson (2019)
  5. ▲ 1
    Orjson: Fast, correct Python JSON library
    story by zerojames · 2024-05-28 · 0 comments
  6. ▲ 4
    orjson: Fast, correct Python JSON lib (supports dataclasses, datetimes, numpy)
    story by tosh · 2023-03-06 · 0 comments
  7. …same way pandas was used (ie, `python -c "..."`)? [0] https://github.com/ultrajson/ultrajson [1] https://github.com/ijl/orjson
    comment by davidatbu · 2022-04-12 · in The fastest tool for querying large JSON files is written in Python (benchmark)
  8. …to serialization, which can be addressed by swapping in a fast serialization library like orjson ( https://github.com/ijl/orjson ). Though even then you’d probably have a hard time getting to tens of milliseconds. Other common culprits:…
    comment by radus · 2021-12-16 · in Show HN: FastWSGI, an ultra-fast WSGI server for Python
  9. …looking for a fast JSON lib for CPython, orjson[1] (written in rust) is the best I've found. [1] https://github.com/ijl/orjson#performance
    comment by fastball · 2020-08-06 · in Simdjson: Parsing gigabytes of JSON per second
  10. …(and my favorite) JSON (de)serializer available for Python, orjson[1], does not support pypy. [1] https://github.com/ijl/orjson
    comment by fastball · 2020-05-20 · in Python performance: it’s not just the interpreter
  11. ▲ 3
    orjson v3, fast Python JSON library supporting dataclasses, numpy
    story by ijl · 2020-05-01 · 0 comments
  12. ▲ 40
    Show HN: Python JSON library in Rust, faster than ujson
    story by ijl · 2018-12-19 · 4 comments