Mercurial > cpython-lru_cache-weakref

annotate Doc/includes/mp_benchmarks.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 3c7eef187bea
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #
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2 # Simple benchmarks for the multiprocessing package
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3 #
50004
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4 # Copyright (c) 2006-2008, R Oudkerk
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5 # All rights reserved.
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6 #
47595
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7
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8 import time, sys, multiprocessing, threading, Queue, gc
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9
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10 if sys.platform == 'win32':
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11 _timer = time.clock
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12 else:
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13 _timer = time.time
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14
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15 delta = 1
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16
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17
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18 #### TEST_QUEUESPEED
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19
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20 def queuespeed_func(q, c, iterations):
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21 a = '0' * 256
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22 c.acquire()
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23 c.notify()
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24 c.release()
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25
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26 for i in xrange(iterations):
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27 q.put(a)
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28
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29 q.put('STOP')
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30
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31 def test_queuespeed(Process, q, c):
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32 elapsed = 0
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33 iterations = 1
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34
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35 while elapsed < delta:
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36 iterations *= 2
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37
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38 p = Process(target=queuespeed_func, args=(q, c, iterations))
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39 c.acquire()
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40 p.start()
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41 c.wait()
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42 c.release()
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43
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44 result = None
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45 t = _timer()
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46
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47 while result != 'STOP':
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48 result = q.get()
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49
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50 elapsed = _timer() - t
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51
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52 p.join()
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53
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54 print iterations, 'objects passed through the queue in', elapsed, 'seconds'
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55 print 'average number/sec:', iterations/elapsed
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56
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57
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58 #### TEST_PIPESPEED
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59
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60 def pipe_func(c, cond, iterations):
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61 a = '0' * 256
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62 cond.acquire()
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63 cond.notify()
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64 cond.release()
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65
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66 for i in xrange(iterations):
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67 c.send(a)
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68
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69 c.send('STOP')
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70
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71 def test_pipespeed():
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72 c, d = multiprocessing.Pipe()
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73 cond = multiprocessing.Condition()
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74 elapsed = 0
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75 iterations = 1
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76
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77 while elapsed < delta:
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78 iterations *= 2
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79
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80 p = multiprocessing.Process(target=pipe_func,
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81 args=(d, cond, iterations))
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82 cond.acquire()
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83 p.start()
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84 cond.wait()
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85 cond.release()
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86
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87 result = None
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88 t = _timer()
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89
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90 while result != 'STOP':
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91 result = c.recv()
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92
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93 elapsed = _timer() - t
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94 p.join()
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95
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96 print iterations, 'objects passed through connection in',elapsed,'seconds'
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97 print 'average number/sec:', iterations/elapsed
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98
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99
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100 #### TEST_SEQSPEED
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101
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102 def test_seqspeed(seq):
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103 elapsed = 0
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104 iterations = 1
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105
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106 while elapsed < delta:
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107 iterations *= 2
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108
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109 t = _timer()
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110
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111 for i in xrange(iterations):
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112 a = seq[5]
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113
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114 elapsed = _timer()-t
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115
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116 print iterations, 'iterations in', elapsed, 'seconds'
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117 print 'average number/sec:', iterations/elapsed
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118
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119
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120 #### TEST_LOCK
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121
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122 def test_lockspeed(l):
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123 elapsed = 0
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124 iterations = 1
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125
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126 while elapsed < delta:
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127 iterations *= 2
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128
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129 t = _timer()
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130
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131 for i in xrange(iterations):
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132 l.acquire()
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133 l.release()
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134
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135 elapsed = _timer()-t
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136
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137 print iterations, 'iterations in', elapsed, 'seconds'
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138 print 'average number/sec:', iterations/elapsed
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139
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140
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141 #### TEST_CONDITION
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142
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143 def conditionspeed_func(c, N):
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144 c.acquire()
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145 c.notify()
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146
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147 for i in xrange(N):
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148 c.wait()
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149 c.notify()
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150
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151 c.release()
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152
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153 def test_conditionspeed(Process, c):
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154 elapsed = 0
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155 iterations = 1
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156
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157 while elapsed < delta:
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158 iterations *= 2
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159
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160 c.acquire()
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161 p = Process(target=conditionspeed_func, args=(c, iterations))
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162 p.start()
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163
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164 c.wait()
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165
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166 t = _timer()
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167
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168 for i in xrange(iterations):
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169 c.notify()
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170 c.wait()
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171
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172 elapsed = _timer()-t
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173
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174 c.release()
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175 p.join()
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176
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177 print iterations * 2, 'waits in', elapsed, 'seconds'
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178 print 'average number/sec:', iterations * 2 / elapsed
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179
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180 ####
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181
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182 def test():
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183 manager = multiprocessing.Manager()
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184
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185 gc.disable()
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186
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187 print '\n\t######## testing Queue.Queue\n'
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188 test_queuespeed(threading.Thread, Queue.Queue(),
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189 threading.Condition())
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190 print '\n\t######## testing multiprocessing.Queue\n'
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191 test_queuespeed(multiprocessing.Process, multiprocessing.Queue(),
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192 multiprocessing.Condition())
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193 print '\n\t######## testing Queue managed by server process\n'
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194 test_queuespeed(multiprocessing.Process, manager.Queue(),
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195 manager.Condition())
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196 print '\n\t######## testing multiprocessing.Pipe\n'
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197 test_pipespeed()
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198
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199 print
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200
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201 print '\n\t######## testing list\n'
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202 test_seqspeed(range(10))
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203 print '\n\t######## testing list managed by server process\n'
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204 test_seqspeed(manager.list(range(10)))
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205 print '\n\t######## testing Array("i", ..., lock=False)\n'
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206 test_seqspeed(multiprocessing.Array('i', range(10), lock=False))
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207 print '\n\t######## testing Array("i", ..., lock=True)\n'
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208 test_seqspeed(multiprocessing.Array('i', range(10), lock=True))
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209
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210 print
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211
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212 print '\n\t######## testing threading.Lock\n'
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213 test_lockspeed(threading.Lock())
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214 print '\n\t######## testing threading.RLock\n'
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215 test_lockspeed(threading.RLock())
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216 print '\n\t######## testing multiprocessing.Lock\n'
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217 test_lockspeed(multiprocessing.Lock())
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218 print '\n\t######## testing multiprocessing.RLock\n'
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219 test_lockspeed(multiprocessing.RLock())
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220 print '\n\t######## testing lock managed by server process\n'
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221 test_lockspeed(manager.Lock())
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222 print '\n\t######## testing rlock managed by server process\n'
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223 test_lockspeed(manager.RLock())
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224
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225 print
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226
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227 print '\n\t######## testing threading.Condition\n'
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228 test_conditionspeed(threading.Thread, threading.Condition())
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229 print '\n\t######## testing multiprocessing.Condition\n'
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230 test_conditionspeed(multiprocessing.Process, multiprocessing.Condition())
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231 print '\n\t######## testing condition managed by a server process\n'
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232 test_conditionspeed(multiprocessing.Process, manager.Condition())
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233
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234 gc.enable()
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235
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236 if __name__ == '__main__':
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237 multiprocessing.freeze_support()
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238 test()