Python đặt thời gian thực hiện tối đa
Có nhiều mô-đun Python như mô-đun time, timeit và datetime trong Python có thể lưu trữ thời gian mà một phần cụ thể của chương trình đang được thực thi. Bằng cách thao tác hoặc lấy sự khác biệt giữa thời điểm bắt đầu và kết thúc khi một phần cụ thể đang được thực thi, chúng ta có thể tính toán thời gian cần thiết để thực hiện phần đó. Show
Các phương pháp sau đây có thể được sử dụng để tính chênh lệch thời gian
Sử dụng mô-đun thời gian kiểm tra thời gian thực thi của Pythonví dụ 1. Đo thời gian thực hiện cho một đoạn mã bằng cách ghi lại thời gian bắt đầu và kết thúcTính toán thời gian bằng cách sử dụng mô-đun thời gian và thời gian. hàm thời gian (). Chúng tôi đã tính toán thời gian của chương trình trên, xuất hiện theo thứ tự 10^-3. Chúng ta có thể kiểm tra thời gian bằng cách tăng số lần tính toán bằng các thuật toán tương tự Python3Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms83 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms84 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms85
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Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms5 ví dụ 2. Đo thời gian dành cho một đoạn mã bằng cách cộng thời gian cần thiết cho mỗi lần lặp lạiKiểm tra thời gian thực hiện chương trình cho các số lần tính toán khác nhau. Chúng tôi nhận thấy xu hướng chung là tăng thời gian tính toán để tăng số lần thực hiện. Tuy nhiên, nó có thể không hiển thị bất kỳ xu hướng tuyến tính hoặc mức tăng cố định nào Python3Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... 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Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms12 đầu ra Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms0 Sử dụng mô-đun timeit kiểm tra thời gian thực hiệnĐiều này sẽ cho chúng ta thời gian thực hiện của bất kỳ chương trình nào. Mô-đun này cung cấp một cách đơn giản để tìm thời gian thực thi của các đoạn mã Python nhỏ. Nó cung cấp phương thức timeit() để làm điều tương tự. Chức năng mô-đun timeit. timeit(stmt, setup, timer, number) chấp nhận bốn đối số
ví dụ 1. Sử dụng timeit bên trong đoạn mã Python để đo thời gian thực hiệnPython3Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms55 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms84 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms57
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Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms19 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms05 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms98 Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms12 đầu ra Iteration: 100 Time taken: 0.105ms Iteration: 200 Time taken: 0.191ms Iteration: 300 Time taken: 0.291ms Iteration: 400 Time taken: 0.398ms Iteration: 500 Time taken: 0.504ms Iteration: 600 Time taken: 0.613ms Iteration: 700 Time taken: 0.791ms ... Iteration: 5400 Time taken: 6.504ms Iteration: 5500 Time taken: 6.630ms1 ví dụ 2. Sử dụng timeit từ dòng lệnh để đo thời gian thực hiệnChúng ta có thể đo thời gian thực hiện bằng các câu lệnh mã đơn giản mà không cần phải viết tệp Python mới, sử dụng giao diện timeit CLI |