update

2022.03.06_numba_time/numba_time_1.py

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+from numba import jit
+import numpy as np
+import time
+
+numpy_array = np.arange(0,1e5,1)
+times = 1000
+
+def for_sum(numpy_array):
+    sum = 0
+    for number in numpy_array:
+        sum += number
+    return sum
+
+start = time.time()
+for _ in range(times):
+    result = for_sum(numpy_array)
+end = time.time()
+print('for循环求和时间：', end - start)
+
+start = time.time()
+for _ in range(times):
+    result = sum(numpy_array)
+end = time.time()
+print('sum()函数求和时间：', end - start)
+
+start = time.time()
+for _ in range(times):
+    result = np.sum(numpy_array)
+end = time.time()
+print('numpy.sum()函数求和时间：', end - start)
+
+print()
+
+@jit
+def numba_for_sum(numpy_array):
+    sum = 0
+    for number in numpy_array:
+        sum += number
+    return sum
+
+@jit
+def numba_np_sum(numpy_array):
+    result = np.sum(numpy_array)
+    return result
+
+@jit(nopython=True)
+def numba_nopython_np_sum(numpy_array):
+    result = np.sum(numpy_array)
+    return result
+
+@jit(nopython=True, parallel=True)
+def numba_nopython_parallel_np_sum(numpy_array):
+    result = np.sum(numpy_array)
+    return result
+
+start = time.time()
+for _ in range(times):
+    result = numba_for_sum(numpy_array)
+end = time.time()
+print('numba + for循环求和时间：', end - start)
+
+start = time.time()
+for _ in range(times):
+    result = numba_np_sum(numpy_array)
+end = time.time()
+print('numba + numpy.sum()函数求和时间：', end - start)
+
+start = time.time()
+for _ in range(times):
+    result = numba_nopython_np_sum(numpy_array)
+end = time.time()
+print('numba(nopython) + numpy.sum()函数求和时间：', end - start)
+
+start = time.time()
+for _ in range(times):
+    result = numba_nopython_parallel_np_sum(numpy_array)
+end = time.time()
+print('numba(nopython,parallel) + numpy.sum()函数求和时间：', end - start)