BUG: DatetimeIndex cannot parse string ndarray with dayfirst

[sinhrks]

Closes #5917.

[jreback]

can you run a perf check and post the outliers (i dont' think its a problem), but just checking

[jreback]

@sinhrks can you post a perf check?

[jreback]

@sinhrks need a perf check on this

[sinhrks]

@jreback Sorry to delay. Rebased, and following is vbench results. Looks OK as there is no tests get slower constantly.

# 1st run ------------------------------------------------------------------------------- Test name | head[ms] | base[ms] | ratio | ------------------------------------------------------------------------------- groupby_pivot_table | 43.2317 | 36.2120 | 1.1939 | frame_reindex_axis1 | 372.5393 | 306.3263 | 1.2162 | groupby_transform | 405.6187 | 328.8047 | 1.2336 | groupby_multi_different_numpy_functions | 30.6609 | 24.5076 | 1.2511 | groupby_indices | 19.0316 | 14.9120 | 1.2763 | groupby_multi_series_op | 33.6157 | 26.0634 | 1.2898 | groupby_multi_count | 18.2153 | 14.0044 | 1.3007 | groupby_multi_different_functions | 30.1137 | 22.8820 | 1.3160 | groupby_sum_booleans | 2.6333 | 1.9503 | 1.3502 | dataframe_reindex | 1.1314 | 0.8047 | 1.4060 | groupby_last | 9.5390 | 6.7446 | 1.4143 | ------------------------------------------------------------------------------- # 2nd run ------------------------------------------------------------------------------- Test name | head[ms] | base[ms] | ratio | ------------------------------------------------------------------------------- frame_drop_dup_inplace | 6.6934 | 5.7159 | 1.1710 | reindex_fillna_backfill | 1.0877 | 0.8977 | 1.2116 | frame_constructor_ndarray | 0.2096 | 0.1643 | 1.2756 | ctor_index_array_string | 0.0536 | 0.0420 | 1.2784 | frame_get_numeric_data | 0.3580 | 0.2743 | 1.3050 | series_constructor_ndarray | 0.0536 | 0.0386 | 1.3889 | index_from_series_ctor | 0.0663 | 0.0473 | 1.4017 | ------------------------------------------------------------------------------- 

[cpcloud]

Are those against latest master?

[sinhrks]

Based on latest master on May 9th. Anything unexpected?

Target [bdb2f8f] : modified Base [16a8902] : Merge pull request #7081 from TomAugspurger/fwf-slice BUG: read_fwf colspec should treat None like slice 

[sinhrks]

Rebased to latest and run perf again.

------------------------------------------------------------------------------- Test name | head[ms] | base[ms] | ratio | ------------------------------------------------------------------------------- reindex_fillna_backfill | 1.0796 | 0.9297 | 1.1613 | timeseries_1min_5min_mean | 1.3570 | 1.0761 | 1.2611 | frame_get_numeric_data | 0.3453 | 0.2646 | 1.3048 | ------------------------------------------------------------------------------- Target [ee1e70b] : BUG: DatetimeIndex cannot parse string ndarray with dayfirst Base [ecaa39c] : Merge pull request #7087 from jreback/series_cache 

[jreback]

thanks!