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Fast arbitrary precision correctly-rounded decimal floating point arithmetic.

Project Description

Overview

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

Testing

Both cdecimal and the underlying library - libmpdec - are extremely well tested. libmpdec is one of the few open source projects with 100% code coverage. cdecimal is rigorously tested against decimal.py.

Short benchmarks

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.py.

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

Documentation

Since cdecimal is compatible with decimal.py, the official documentation is valid. For the few remaining differences, refer to the second link.

Linux Notes

The build process requires a working C compiler and a full Python install with development headers. Linux distributions often ship the Python header files as a separate package, called python-dev or python-devel.

Install headers on Debian/Ubuntu:

  • sudo apt-get install python-dev

Windows Notes

Release History

Release History

This version
History Node

2.3

Download Files

Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
m3-cdecimal-2.3.tar.gz (640.0 kB) Copy SHA256 Checksum SHA256 Source Sep 23, 2014

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