Episode: Line Level Profiling

[Robadob]

Learning Objectives

• decorate Python code to prepare it for line_profiler
• execute a Python program via line_profiler to collect profiling information about a Python program’s execution
• interpret output from line_profiler, to identify the lines where time is being spent during a program’s execution

Exercises

A couple of examples where line profiling is appropriate:

• e.g. decorating a specific function
• e.g. one where there are no functions, so how to decorate

Keypoints

These will need updating when the content has been written.

• Specific functions can be line level profiled with line_profiler if decorated with @profile
• Code in global scope must wrapped if it is to be profiled with line_profiler
• The output from line_profiler lists the time spent per targeted line of code in descending order.