Quick shift fixes#6747

Merged

jreback merged 2 commits intopandas-dev:masterfrom

dalejung:quick_shift_fixes

Mar 31, 2014

Commits on Mar 31, 2014

PRF: .shift() speedup: Only pass in c_contiguous arrays to np.roll/take
dalejung
committed
PRF: Fixed shift speed tests and added consolidated DataFrame shift perf
dalejung
committed