update

2022.03.06_numba_time/numba_time.py

@@ -1,42 +0,0 @@
-from numba import jit
-import numpy as np
-import time
-
-def for_sum(numpy_array):
-    sum = 0
-    for number in numpy_array:
-        sum += number
-    return sum
-
-@jit
-def numba_for_sum(numpy_array):
-    sum = 0
-    for number in numpy_array:
-        sum += number
-    return sum
-
-numpy_array = np.arange(0,2e8,1)
-
-start = time.time()
-result = sum(numpy_array)
-end = time.time()
-print('\nresult:', result)
-print('python中sum()函数求和时间：', end - start)
-
-start = time.time()
-result = np.sum(numpy_array)
-end = time.time()
-print('\nresult:', result)
-print('numpy.sum()函数求和时间：', end - start)
-
-start = time.time()
-result = for_sum(numpy_array)
-end = time.time()
-print('\nresult:', result)
-print('for循环求和numpy数组的时间：', end - start)
-
-start = time.time()
-result = numba_for_sum(numpy_array)
-end = time.time()
-print('\nresult:', result)
-print('numba加速for循环求和numpy数组的时间：', end - start, '\n')

2022.03.06_numba_time/numba_time_1.py

@@ -0,0 +1,78 @@
+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)

2022.03.06_numba_time/numba_time_2.py

@@ -3,6 +3,9 @@ from numba import prange
 import time
 import numpy as np
 
+numpy_array = np.arange(0,1e5,1)
+times = 1000
+
 def for_sum(numpy_array):
     sum = 0
     for number in numpy_array:
@@ -30,28 +33,26 @@ def numba_for_sum_3(numpy_array):
         sum += numpy_array[i]
     return sum
 
-numpy_array = np.arange(0,1e9,1)
-
 start = time.time()
+for _ in range(times):
     result = for_sum(numpy_array)
 end = time.time()
-print('\nresult:', result)
 print('for循环时间：', end - start)
 
 start = time.time()
+for _ in range(times):
     result = numba_for_sum_1(numpy_array)
 end = time.time()
-print('\nresult:', result)
+print('@jit时间：', end - start)
-print('@jit时间：', end - start, '\n')
 
 start = time.time()
+for _ in range(times):
     result = numba_for_sum_2(numpy_array)
 end = time.time()
-print('\nresult:', result)
+print('@jit(nopython=True)时间：', end - start)
-print('@jit(nopython=True)时间：', end - start, '\n')
 
 start = time.time()
+for _ in range(times):
     result = numba_for_sum_3(numpy_array)
 end = time.time()
-print('\nresult:', result)
+print('@jit(nopython=True, parallel=True)时间：', end - start)
-print('@jit(nopython=True, parallel=True)时间：', end - start, '\n')