Skip to main content

collections.namedtuple implemented in c.

Project description

An implementation of namedtuple written in c for warp speed.

Tested against Python 3.4 and 3.5, and 3.6 as of 3084914245d2

Warp Speed

Time to go fast.

Setup

Use qualified imports so that we can tell which namedtuple we are using.

>>> from namedtuple import namedtuple as cnamedtuple
>>> from collections import namedtuple as stdnamedtuple
>>> from pickle import dumps, loads

Little numbers

Cute graphs

These operations scale with the number of fields.

Type creation from a string of field names.

Type creation from a string of field names.

Type creation from a sequence of field names.

Type creation from a sequence of field names.

Instance creation.

Instance creation.

Less cute numbers

These operations do not scale with number of fields.

std_inst is an instance of a collections.namedtuple created type with six named fields: a, b, c, d, e, and f.

c_inst is an instance of a cnamedtuple.namedtuple created type with six named fields: a, b, c, d, e, and f.

Field Access
In [1]: %timeit std_inst.c
10000000 loops, best of 3: 71.9 ns per loop

In [2]: %timeit c_inst.c
10000000 loops, best of 3: 38.4 ns per loop
Pickle Roundtrip
In [3]: %timeit loads(dumps(std_inst))
100000 loops, best of 3: 6.28 µs per loop

In [4]: %timeit loads(dumps(c_inst))
100000 loops, best of 3: 4.72 µs per loop

Contributing

The project is hosted on github.

Before submitting a patch, please make sure your Python code is PEP8 compliant and your c code is PEP7 compliant.

Contact

Please file all bug reports on github.

For questions or comments, feel free to email me at joe@quantopian.com

Project details


Download files

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

Filename, size & hash SHA256 hash help File type Python version Upload date
cnamedtuple-0.1.6.tar.gz (10.8 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page