In this section:
- Starting the profiling session
- Working with the profiling results
PyCharm allows running the current run/debug configuration while attaching a Python profiler to it.
Besides these two tracing profilers, PyCharm supports also sampling (statistical) profiler vmprof, which should be installed on the selected Python interpreter.
Starting the profiling session
To start the profiling session, do one of the following:
The profiler starts in the dedicated tab of the Run tool window:
Working with the profiling results
On the toolbar of the profiler tab, click . This action results in the following:
- The snapshot is saved to the default location under
.PyCharmXX/system/snapshotsdirectory under the user's home. For CProfiler, it is saved as
- The profiling results open in the
<project name>.pstattab in the editor, which consists of two tabs: Statistics and Call Graph:
Jumping to the source code
The source code of the function in question opens in the editor.
Viewing Call Graph
To increase the graph scale, click ; to show actual size of the graph, click .
Use the toolbar button to fit contents into the current diagram size.
To decrease the graph scale, use .
Note the color codes on the Call Graph. The functions marked red consume more time; the fastest functions are green.
Reviewing the existing snapshots
To open an existing snapshot, follow these steps:
- On the main menu, choose .
- In the Select PStat file dialog, choose the desired file with the extension
The profiling results open in the
<project name>.pstattab in the editor.