Faster, more memory-efficient Python JSON parsing with msgspec

If you need to process a large JSON file in Python, you want:

1. Make sure you don’t use too much memory, so you don’t crash half-way through.
2. Parse it as quickly as possible.
3. Ideally, make sure the data is actually valid up-front, with the right structure, so you don’t blow up half-way through your analysis.

You can put together solutions with multiple libraries, of course.
Or, you can use msgspec a new library that offers schemas, fast parsing, and some neat tricks to reduce memory usage, all in a single library.

A starting point: built-in json and orjson

Let’s start by looking at two other libraries: the built-in json module in Python, and the speedy