pintrs 0.2.5

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.

Operation	pintrs	pint	Speedup
Quantity creation	0.37 us	3.33 us	9x
Parse string ("9.81 m/s**2")	0.55 us	50.21 us	91x
Conversion (km -> m)	0.94 us	7.43 us	8x
Conversion (km/h -> m/s)	1.71 us	13.30 us	8x
Addition (same units)	0.34 us	4.64 us	14x
Addition (compatible units)	1.03 us	11.56 us	11x
Multiply by scalar	0.25 us	5.31 us	21x
Multiply quantities	0.38 us	5.01 us	13x
Comparison (>)	0.12 us	1.16 us	10x
To base units	0.37 us	6.43 us	17x
Parse units ("kg * m / s ** 2")	0.26 us	38.85 us	152x
String formatting	0.44 us	7.20 us	16x

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.