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Benchmarks

Below are the results of crude benchmarks comparing pydantic to other validation libraries.

Package	Version	Relative Performance	Mean validation time
pydantic	1.1		43.6μs
attrs + cattrs	19.3.0	1.4x slower	59.9μs
valideer	0.4.2	1.4x slower	61.8μs
marshmallow	3.2.2	2.5x slower	107.6μs
trafaret	2.0.0	3.4x slower	148.7μs
django-restful-framework	3.10.3	12.6x slower	551.2μs
cerberus	1.3.2	26.3x slower	1146.3μs

See the benchmarks code for more details on the test case. Feel free to suggest more packages to benchmark or improve an existing one.

Benchmarks were run with Python 3.7.4 and the package versions listed above installed via pypi on Ubuntu 18.04.