[Numpy-svn] [numpy/numpy] cd2121: ENH: speed up cov by ~10% for large arrays

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/numpy/numpy
  Commit: cd212173210a59ff34aa4edd3308bc520ee3e974
      https://github.com/numpy/numpy/commit/cd212173210a59ff34aa4edd3308bc520ee3e974
  Author: Lars Buitinck <larsmans at gmail.com>
  Date:   2015-10-05 (Mon, 05 Oct 2015)

  Changed paths:
    M numpy/lib/function_base.py

  Log Message:
  -----------
  ENH: speed up cov by ~10% for large arrays

Replaces n² divisions by one division and n² multiplications.


  Commit: 09c958b0100860db9549a17b6d1684f3c9fb8885
      https://github.com/numpy/numpy/commit/09c958b0100860db9549a17b6d1684f3c9fb8885
  Author: Charles Harris <charlesr.harris at gmail.com>
  Date:   2015-10-05 (Mon, 05 Oct 2015)

  Changed paths:
    M numpy/lib/function_base.py

  Log Message:
  -----------
  Merge pull request #6411 from larsmans/cov-memory-use

ENH: speed up cov by ~10% for large arrays


Compare: https://github.com/numpy/numpy/compare/d5bde029dea3...09c958b01008