Python Profile Subprocess [With Examples]

Profiling a subprocess in Python can be done using the cProfile module in combination with the subprocess module. Here’s a step-by-step guide on how to profile a subprocess:

1. Import the necessary modules:

import cProfile
import subprocess
Code language: Python (python)

2. Define a function that runs the subprocess and returns its output. You can use the subprocess.run function to execute a command:

def run_subprocess(command):
    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, text=True)
    return result
Code language: Python (python)

In this example, command is a string representing the command you want to execute.

3. Create a profile object from the cProfile module:

profiler = cProfile.Profile()
Code language: Python (python)

4. Use the profiler object to profile the run_subprocess function:

profiler.enable()
result = run_subprocess("your_command_here")
profiler.disable()
Code language: Python (python)

Replace "your_command_here" with the actual command you want to run.

5. You can then print or save the profiling results. For example, you can use pstats module to display the profiling results in a human-readable format:

import pstats

stats = pstats.Stats(profiler)
stats.sort_stats('cumulative')  # You can choose different sorting options
stats.print_stats()
Code language: Python (python)

This will print a list of functions and their respective profiling statistics, sorted by the cumulative time spent in each function.

Here’s a complete example:

import cProfile
import subprocess
import pstats

def run_subprocess(command):
    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, text=True)
    return result

profiler = cProfile.Profile()
profiler.enable()
result = run_subprocess("your_command_here")
profiler.disable()

stats = pstats.Stats(profiler)
stats.sort_stats('cumulative')
stats.print_stats()
Code language: Python (python)

This code will run the specified subprocess command and profile its execution, providing you with valuable insights into the performance of the subprocess.

Read More;

• Best Python cProfile Alternative
• Python cProfile Filter
• Python cProfile Gunicorn With Example
• Python Profile Guided Optimization
• Profiling in FastAPI Python Applications
• Python cProfile Export With Example
• Python Error: “AttributeError: __enter__”
• subprocess-exited-with-error in Python
• Python Volume Profile With Example
• Python Profile likelihood
• Python voigt Profile 
• Python’s Pandas Library vs Pandas Profiling