Processing JSON 2.5x faster than simdjson with msgspec

1. ultrajson

   1 5 4,385 7.2 C

   Ultra fast JSON decoder and encoder written in C with Python bindings

   

   ujson

2. CodeRabbit

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   CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.

   

3. orjson

   2 22 6,682 8.0 Python

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

   

   orjson

4. pysimdjson

   3 6 662 0.0 Python

   Python bindings for the simdjson project.

   

   simdjson

5. msgspec

   4 32 2,664 7.7 Python

   A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

   

   Msgspec achieves this performance by doing less work - it's only parsing the fields that are used for the query. Allocating objects in Python can be slow, by specifying the required fields for the query (though a type annotated schema), we reduce allocations to the bare minimum resulting in measurable speedups. There's a longer writeup in the example docs if you're interested.

6. conda

   5 32 6,724 9.8 Python

   A system-level, binary package and environment manager running on all major operating systems and platforms.

   

   I wrote this up as a demo of some potential optimization work in conda, but the same principle could be applied to other projects.

7. SaaSHub

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