v.0.6.1 (December 13, 2011)

New features

Performance improvements

  • Improve memory usage of DataFrame.describe (do not copy data unnecessarily) (PR #425)
  • Optimize scalar value lookups in the general case by 25% or more in Series and DataFrame
  • Fix performance regression in cross-sectional count in DataFrame, affecting DataFrame.dropna speed
  • Column deletion in DataFrame copies no data (computes views on blocks) (GH #158)


A total of 7 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.

  • Dieter Vandenbussche
  • Fernando Perez +
  • Jev Kuznetsov +
  • Joon Ro
  • Ralph Bean +
  • Wes McKinney
  • Wouter Overmeire
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