May 26, 2018

Fast drop-in replacement for the Decimal module

The cdecimal is a fast drop-in replacement for the decimal module in Python’s standard library. Both modules provide complete implementations of the General Decimal Arithmetic Specification.

Typical performance gains are between 30x for I/O heavy benchmarks and 80x for numerical programs. In a database benchmark, cdecimal exhibits a speedup of 12x over

decimal cdecimal speedup

pi 42.75s 0.58s 74x telco 172.19s 5.68s 30x psycopg 3.57s 0.29s 12x

All Python versions from 2.5 up to 3.2 are supported. For the few remaining differences, read the cdecimal documentation. cdecimal has been included in Python-3.3.

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