pintrs 0.3.0

Fast Rust-based Python extension for physical unit manipulation

pintrs

If you like pint but wish it were faster, pintrs is for you. Same API, same workflow, but with the heavy lifting done in Rust.

Installation

pip install pintrs

Migration

pintrs is designed as a drop-in replacement. Swap your dependency, update your imports, and you're done.

- pint
+ pintrs

- from pint import UnitRegistry
+ from pintrs import UnitRegistry

ureg = UnitRegistry()
distance = 5 * ureg.kilometer
time = 2 * ureg.hour
speed = (distance / time).to("m/s")

How much faster?

Here's what you get for that one-line change. Measured with Python 3.12; run python examples/benchmark.py to reproduce.

Scalar operations:

Operation	pintrs	pint	Speedup
Parse expression	0.6 us	140 us	219x
Conversion (q.to("km"))	1.0 us	46 us	46x
Multiply by scalar	0.3 us	7.0 us	25x
Quantity creation	0.5 us	7.7 us	16x
To base units	0.4 us	3.4 us	8x
Addition (same units)	0.5 us	4.5 us	8x
Multiply quantities	0.8 us	5.5 us	7x

NumPy arrays (1000 elements):

Operation	pintrs	pint	Speedup
Conversion (arr.to("km"))	1.7 us	48 us	28x
Sum	1.2 us	23 us	19x
Create	1.2 us	8.2 us	7x
Multiply by scalar	1.0 us	6.9 us	7x
Addition	0.8 us	5.4 us	7x

Something not working?

If you hit a compatibility issue or something behaves differently from pint, please open an issue. Migration should be painless, and if it isn't, we want to know about it.