PySizer - a memory profiler for Python

PySizer is a memory usage profiler for Python code.

Downloading

You can get version 0.1.1 here.

There's a win32 build for Python 2.4 here.

0.1.1 has bugfixes to 0.1 - in particular, a nasty bug which meant that copy and filterd were more or less broken. Also, it should work under Python 2.3 (but it hasn't been tested much) and under Windows, though I quietly put those two into 0.1 anyway.

The source is kept using Subversion at http://codespeak.net/svn/user/nick8325/sizer, and you can browse the source here too. The SVN head is broken at the moment, though.

Features

• You can make a snapshot of all reachable objects at a given time, organised as a tree (well, a graph, since there are cycles).
• For any given object, you can find out how much space it takes up, what objects it references and so on.

  With a patched version of Python, you can also find out what stack of function calls created an object, and what objects were created by each stack of calls.

• You can collect objects into groups. For example, you can group each object according to the module it appears to come from. Then you can treat the group as a single object.
• You can filter objects, find the amount of space used by instances of each type, find objects which appeared from one snapshot to the next, find the biggest objects/types/groups, and other things.

Requirements

See here.

Documentation

There's a tutorial here.

There's some automatically-generated documentation here.

Both of these come with the release.

Bugs, feature requests, problems, anything else

You can contact me at nick.smallbone@gmail.com.