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  1. Ubuntu 14.04 (trusty) (kernel 3.16.0-46-generic)
  2. Intel(R) Core(TM) i7-4600M CPU @ 2.90GHz
  3. compiles and tests OK
  4.  
  5. n = 1024
  6. determining the best chunk size for float
  7. chunk size 8: 1.3779e-06
  8. chunk size 16: 1.04861e-06
  9. chunk size 32: 9.08014e-07
  10. chunk size 64: 8.43793e-07
  11. chunk size 128: 7.82356e-07
  12. chunk size 256: 7.45098e-07
  13. chunk size 512: 7.2803e-07
  14. chunk size 1024: 7.29652e-07
  15. best chunk: 512
  16. best time: 7.2803e-07
  17. determining the best chunk size for double
  18. chunk size 8: 2.66358e-06
  19. chunk size 16: 1.83164e-06
  20. chunk size 32: 1.49206e-06
  21. chunk size 64: 1.40959e-06
  22. chunk size 128: 1.30742e-06
  23. chunk size 256: 1.27548e-06
  24. chunk size 512: 1.23629e-06
  25. chunk size 1024: 1.25055e-06
  26. best chunk: 512
  27. best time: 1.23629e-06
  28.  
  29. n = 1048576
  30. determining the best chunk size for float
  31. chunk size 8: 0.00299044
  32. chunk size 16: 0.00266437
  33. chunk size 32: 0.00255392
  34. chunk size 64: 0.00244511
  35. chunk size 128: 0.0023724
  36. chunk size 256: 0.00240621
  37. chunk size 512: 0.00239188
  38. chunk size 1024: 0.00235073
  39. chunk size 2048: 0.0023583
  40. chunk size 4096: 0.00235412
  41. chunk size 8192: 0.00238721
  42. chunk size 16384: 0.00291113
  43. chunk size 32768: 0.0029814
  44. chunk size 65536: 0.0031492
  45. chunk size 131072: 0.00356279
  46. chunk size 262144: 0.003626
  47. chunk size 524288: 0.00365495
  48. chunk size 1048576: 0.00386137
  49. best chunk: 1024
  50. best time: 0.00235073
  51. determining the best chunk size for double
  52. chunk size 8: 0.00831154
  53. chunk size 16: 0.00762899
  54. chunk size 32: 0.0073073
  55. chunk size 64: 0.00719347
  56. chunk size 128: 0.0070906
  57. chunk size 256: 0.00718733
  58. chunk size 512: 0.00720037
  59. chunk size 1024: 0.00754989
  60. chunk size 2048: 0.00763383
  61. chunk size 4096: 0.00779667
  62. chunk size 8192: 0.00874349
  63. chunk size 16384: 0.00895033
  64. chunk size 32768: 0.00964642
  65. chunk size 65536: 0.0101048
  66. chunk size 131072: 0.0101804
  67. chunk size 262144: 0.0104013
  68. chunk size 524288: 0.0122059
  69. chunk size 1048576: 0.0250085
  70. best chunk: 128
  71. best time: 0.0070906
  72.  
  73. n = 134217728
  74. determining the best chunk size for float
  75. chunk size 8: 1.45078
  76. chunk size 16: 1.26996
  77. chunk size 32: 1.18393
  78. chunk size 64: 1.1873
  79. chunk size 128: 1.19763
  80. chunk size 256: 1.17592
  81. chunk size 512: 1.15457
  82. chunk size 1024: 1.20981
  83. chunk size 2048: 1.23322
  84. chunk size 4096: 1.39006
  85. chunk size 8192: 1.3246
  86. chunk size 16384: 1.48855
  87. chunk size 32768: 1.36817
  88. chunk size 65536: 1.371
  89. chunk size 131072: 1.35226
  90. chunk size 262144: 1.31839
  91. chunk size 524288: 1.37947
  92. chunk size 1048576: 1.79165
  93. chunk size 2097152: 2.51448
  94. chunk size 4194304: 2.63884
  95. chunk size 8388608: 2.69379
  96. chunk size 16777216: 2.77052
  97. chunk size 33554432: 2.72754
  98. chunk size 67108864: 2.75675
  99. chunk size 134217728: 2.87945
  100. best chunk: 512
  101. best time: 1.15457
  102. determining the best chunk size for double
  103. chunk size 8: 3.23893
  104. chunk size 16: 2.89783
  105. chunk size 32: 2.50604
  106. chunk size 64: 2.54896
  107. chunk size 128: 2.62181
  108. chunk size 256: 2.53765
  109. chunk size 512: 2.62137
  110. chunk size 1024: 2.88107
  111. chunk size 2048: 3.06871
  112. chunk size 4096: 3.02266
  113. chunk size 8192: 2.96744
  114. chunk size 16384: 3.10332
  115. chunk size 32768: 3.05128
  116. chunk size 65536: 3.25394
  117. chunk size 131072: 3.22999
  118. chunk size 262144: 3.08339
  119. chunk size 524288: 3.39212
  120. chunk size 1048576: 5.27438
  121. chunk size 2097152: 5.27077
  122. chunk size 4194304: 5.28253
  123. chunk size 8388608: 5.27568
  124. chunk size 16777216: 5.26803
  125. chunk size 33554432: 5.26926
  126. chunk size 67108864: 5.2919
  127. chunk size 134217728: 5.26883
  128. best chunk: 32
  129. best time: 2.50604
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