lemire.me/blog/2026/11/14/reading-json-at-277-gb-s-in-python Reading JSON at 277 GB/s in Python
The author reports benchmarks of fastsimdjson, a threaded parser for Python 3.14’s free-threaded build, on NDJSON event data with selected fields. On a 192-core AWS instance it counted stars at 138 GB/s and reached 277 GB/s on one Twitter file, ahead of a msgspec process pool.
