adii1823
30 lines
766 B
Python
30 lines
766 B
Python
# performance.py
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from time import time
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mx = 5000
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t = time() # start time for the for loop
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floop = []
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for a in range(1, mx):
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for b in range(a, mx):
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floop.append(divmod(a, b))
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print('for loop: {:.4f} s'.format(time() - t)) # elapsed time
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t = time() # start time for the list comprehension
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compr = [
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divmod(a, b) for a in range(1, mx) for b in range(a, mx)]
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print('list comprehension: {:.4f} s'.format(time() - t))
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t = time() # start time for the generator expression
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gener = list(
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divmod(a, b) for a in range(1, mx) for b in range(a, mx))
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print('generator expression: {:.4f} s'.format(time() - t))
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# verify correctness of results and number of items in each list
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print(
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floop == compr == gener, len(floop), len(compr), len(gener)
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)
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