# Measuring function execution time in
# Python using a reusable Timer (milliseconds + seconds)
import time
# ---------------------------
# Reusable Timer class
# ---------------------------
class Timer:
def __init__(self):
self.start = 0.0
self.end = 0.0
# Start the timer
def start_timer(self):
self.start = time.perf_counter() # high‑precision timer
# Stop the timer
def stop_timer(self):
self.end = time.perf_counter()
# Return elapsed time in milliseconds
def elapsed_milliseconds(self):
return (self.end - self.start) * 1000.0
# Return elapsed time in seconds
def elapsed_seconds(self):
return self.end - self.start
# ---------------------------
# Function to measure
# ---------------------------
def work():
s = 0
for i in range(100_000_000):
s += i
# ---------------------------
# Main program
# ---------------------------
if __name__ == "__main__":
t = Timer()
t.start_timer()
work()
t.stop_timer()
ms = t.elapsed_milliseconds()
sec = t.elapsed_seconds()
print("Execution time:", ms, "ms")
print("Execution time:", sec, "seconds")
"""
run:
Execution time: 5462.636256999986 ms
Execution time: 5.462636256999986 seconds
"""
