string mutation methods, fast and slow

import time

text = "Hello"

before = time.time()
for _ in range(100000000):
    text += '0'
print(f'slow method: {time.time()-before:.02f}')


text = ["Hello"]

before = time.time()
for _ in range(100000000):
    text.append('0')
final = ''.join(text)
print(f'slow method: {time.time()-before:.02f}')

# slow method: 645.54
# slow method: 19.04