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FHT test

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Dec 2nd, 2015
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  1. OS: Ubuntu 14.04.3 LTS
  2. CPU: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
  3. Compiler: gcc (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
  4. All tests OK.
  5.  
  6.  
  7. n = 1024
  8. determining the best chunk size for float
  9. chunk size 8: 2.03874e-06
  10. chunk size 16: 1.39541e-06
  11. chunk size 32: 1.28286e-06
  12. chunk size 64: 1.1638e-06
  13. chunk size 128: 1.01276e-06
  14. chunk size 256: 9.53371e-07
  15. chunk size 512: 9.40078e-07
  16. chunk size 1024: 9.11261e-07
  17. best chunk: 1024
  18. best time: 9.11261e-07
  19. determining the best chunk size for double
  20. chunk size 8: 3.65992e-06
  21. chunk size 16: 2.52257e-06
  22. chunk size 32: 2.12051e-06
  23. chunk size 64: 1.92526e-06
  24. chunk size 128: 1.91571e-06
  25. chunk size 256: 1.86763e-06
  26. chunk size 512: 1.79241e-06
  27. chunk size 1024: 1.80064e-06
  28. best chunk: 512
  29. best time: 1.79241e-06
  30.  
  31.  
  32. n = 1048576
  33. determining the best chunk size for float
  34. chunk size 8: 0.00521706
  35. chunk size 16: 0.00417873
  36. chunk size 32: 0.00404502
  37. chunk size 64: 0.00373665
  38. chunk size 128: 0.00357555
  39. chunk size 256: 0.00358942
  40. chunk size 512: 0.00357278
  41. chunk size 1024: 0.00390243
  42. chunk size 2048: 0.00364967
  43. chunk size 4096: 0.00368633
  44. chunk size 8192: 0.00370014
  45. chunk size 16384: 0.00408182
  46. chunk size 32768: 0.00424525
  47. chunk size 65536: 0.00447264
  48. chunk size 131072: 0.00483728
  49. chunk size 262144: 0.00490969
  50. chunk size 524288: 0.00510644
  51. chunk size 1048576: 0.00780737
  52. best chunk: 512
  53. best time: 0.00357278
  54. determining the best chunk size for double
  55. chunk size 8: 0.0104726
  56. chunk size 16: 0.00986728
  57. chunk size 32: 0.00894942
  58. chunk size 64: 0.0087727
  59. chunk size 128: 0.00878956
  60. chunk size 256: 0.00932894
  61. chunk size 512: 0.0105851
  62. chunk size 1024: 0.00964541
  63. chunk size 2048: 0.00970066
  64. chunk size 4096: 0.00963182
  65. chunk size 8192: 0.01086
  66. chunk size 16384: 0.0107882
  67. chunk size 32768: 0.0109409
  68. chunk size 65536: 0.0120599
  69. chunk size 131072: 0.0121866
  70. chunk size 262144: 0.012806
  71. chunk size 524288: 0.0223642
  72. chunk size 1048576: 0.0281717
  73. best chunk: 64
  74. best time: 0.0087727
  75.  
  76.  
  77. n = 134217728
  78. determining the best chunk size for float
  79. chunk size 8: 1.29356
  80. chunk size 16: 1.2593
  81. chunk size 32: 1.25029
  82. chunk size 64: 1.26922
  83. chunk size 128: 1.25689
  84. chunk size 256: 1.22269
  85. chunk size 512: 1.32516
  86. chunk size 1024: 1.38179
  87. chunk size 2048: 1.25173
  88. chunk size 4096: 1.26745
  89. chunk size 8192: 1.24218
  90. chunk size 16384: 1.29082
  91. chunk size 32768: 1.31773
  92. chunk size 65536: 1.33135
  93. chunk size 131072: 1.40313
  94. chunk size 262144: 1.42452
  95. chunk size 524288: 1.39474
  96. chunk size 1048576: 2.01746
  97. chunk size 2097152: 2.4645
  98. chunk size 4194304: 2.43494
  99. chunk size 8388608: 2.469
  100. chunk size 16777216: 2.45618
  101. chunk size 33554432: 2.3852
  102. chunk size 67108864: 2.40547
  103. chunk size 134217728: 2.39217
  104. best chunk: 256
  105. best time: 1.22269
  106. determining the best chunk size for double
  107. chunk size 8: 2.76452
  108. chunk size 16: 2.63898
  109. chunk size 32: 2.59263
  110. chunk size 64: 2.55953
  111. chunk size 128: 2.60953
  112. chunk size 256: 2.59263
  113. chunk size 512: 2.69974
  114. chunk size 1024: 2.63934
  115. chunk size 2048: 2.74713
  116. chunk size 4096: 2.68994
  117. chunk size 8192: 2.78025
  118. chunk size 16384: 2.82447
  119. chunk size 32768: 2.88352
  120. chunk size 65536: 3.05687
  121. chunk size 131072: 3.06945
  122. chunk size 262144: 3.01528
  123. chunk size 524288: 4.23637
  124. chunk size 1048576: 4.98789
  125. chunk size 2097152: 5.04132
  126. chunk size 4194304: 5.06853
  127. chunk size 8388608: 5.11689
  128. chunk size 16777216: 5.08317
  129. chunk size 33554432: 5.07292
  130. chunk size 67108864: 5.0818
  131. chunk size 134217728: 5.06344
  132. best chunk: 64
  133. best time: 2.55953
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