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Project description
Plop is a stack-sampling profiler for Python. Profile collection can be turned on and off in a live process with minimal performance impact.
Plop is currently a work in progress and pretty rough around the edges, so be prepared to run into bugs and extremely unrefined interfaces (which are likely to change in backwards-incompatible ways in future releases).
Installation
pip install plop
Prerequisites
The plop.collector module runs on Python 2.5, 2.6, and 2.7 on Unixy platforms including Linux, BSD and Mac OS X (must support the setitimer system call). The plop.viewer module requires Python 2.7 and Tornado 2.x. The viewer can be (and usually is) run separately from the collector.
Usage
In the application to be profiled, create a plop.collector.Collector, call start(), wait, then stop(). Dump collector.stack_counts to a file. See ProfileHandler in demo/busy_server.py for an example of how to trigger profiling via an HTTP interface.
To use the viewer, run:
python -m plop.viewer --datadir=demo/profiles
and go to http://localhost:8888
Example
An end-to-end demo is available in the demo directory. create_profile.sh will run a server (which talks to itself to generate load), generate a profile, and shut it down. view_profile.sh will run the viewer app.
More info
The source code is hosted at https://github.com/bdarnell/plop
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