Created
September 10, 2020 11:47
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Performance on calculating mean
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| import time | |
| import statistics | |
| import numpy as np | |
| def mean_normal(list_data): | |
| """ | |
| Calculate mean of python list normaly | |
| input: list of int or float | |
| output: mean value | |
| """ | |
| start = time.time() | |
| avg = sum(list_data)/len(list_data) | |
| end = time.time() | |
| print("avg: {} & Time taken by mean_normal: {:.5f} sec".format(avg, end-start)) | |
| return avg | |
| def mean_statistics(list_data): | |
| """ | |
| Calculate mean of python list using statistics lib | |
| input: list of int or float | |
| output: mean value | |
| """ | |
| start = time.time() | |
| avg = statistics.mean(list_data) | |
| end = time.time() | |
| print("avg: {} & Time taken by mean_statistics: {:.5f} sec".format(avg, end-start)) | |
| return avg | |
| def mean_numpy_with_list(list_data): | |
| """ | |
| Calculate mean of python list using numpy lib | |
| input: list of int or float | |
| output: mean value | |
| """ | |
| start = time.time() | |
| avg = np.mean(list_data) | |
| end = time.time() | |
| print("avg: {} & Time taken by mean_numpy_with_list: {:.5f} sec".format(avg, end-start)) | |
| return avg | |
| def mean_numpy_with_array(array_data): | |
| """ | |
| Calculate mean of numpy array using numpy lib | |
| input: 1-d numpy array | |
| output: mean value | |
| """ | |
| start = time.time() | |
| avg = np.mean(array_data) | |
| end = time.time() | |
| print("avg: {} & Time taken by mean_numpy_with_array: {:.5f} sec".format(avg, end-start)) | |
| return avg | |
| if __name__ == '__main__': | |
| # Test with int range | |
| data = list(range(3000000)) | |
| mean_normal(data) | |
| mean_statistics(data) | |
| mean_numpy_with_list(data) | |
| mean_numpy_with_array(np.array(data)) | |
| # Test with float range | |
| data = list(np.linspace(500,1000,3000000)) | |
| mean_normal(data) | |
| mean_statistics(data) | |
| mean_numpy_with_list(data) | |
| mean_numpy_with_array(np.array(data)) |
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For my system, the following are results,
To Do:
[ ] Add graph of time vs length of the list.