1  #!/usr/bin/env python 
 2   
 3  #Let us profile code which uses threads 
 4  import thread 
 5  import time 
 6  from threading import Thread 
 7   
 8 -class MyThread(Thread): 
 9   
10 -    def __init__(self,bignum): 
11   
12          Thread.__init__(self) 
13          self.bignum=bignum 
14       
15 -    def run(self): 
16   
17          for l in range(10): 
18              for k in range(self.bignum): 
19                  res=0 
20                  for i in range(self.bignum): 
21                      res+=1 
22   
23   
24 -def myadd_nothread(bignum): 
25   
26      for l in range(10): 
27          for k in range(bignum): 
28              res=0 
29              for i in range(bignum): 
30                  res+=1 
31   
32      for l in range(10): 
33          for k in range(bignum): 
34              res=0 
35              for i in range(bignum): 
36                  res+=1 
37   
38 -def thread_test(bignum): 
39      #We create 2 Thread objects  for the 2 threads. 
40      thr1=MyThread(bignum) 
41      thr2=MyThread(bignum) 
42   
43      thr1.start() 
44      thr2.start() 
45   
46      thr1.join() 
47      thr2.join() 
48       
49   
50 -def test(): 
51   
52      bignum=1000 
53   
54      #Let us test the threading part 
55   
56      import sys 
57      sys.setcheckinterval(1000) 
58   
59       
60      starttime=time.time() 
61      thread_test(bignum) 
62      stoptime=time.time() 
63   
64      print "Running 2 threads took %.3f seconds" % (stoptime-starttime) 
65       
66      #Now run without Threads. 
67      starttime=time.time() 
68      myadd_nothread(bignum) 
69      stoptime=time.time() 
70   
71      print "Running Without Threads took %.3f seconds" % (stoptime-starttime) 
72   
73   
74  if __name__=="__main__": 
75   
76      test() 
77