Performance timer decorator Dry Run in PYTHON

Performance timer decorator is an interactive PYTHON dry run visualizer from the Advanced programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Performance timer decorator Program Code

import time

def timer(func):
    def wrapper(*args, **kwargs):
        start = time.time()
        result = func(*args, **kwargs)
        end = time.time()
        print(f"{func.__name__} took {end-start:.5f}s")
        return result
    return wrapper

@timer
def slow_square(n):
    time.sleep(0.1)
    return n**2

print(slow_square(5))

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