PERF: calling get_indexer twice when a specialized indexer (e.g. pad) could be called instead

[jreback]

better on reindexing

Invoked with :
--ncalls: 3
--repeats: 3


-------------------------------------------------------------------------------
Test name                                    | head[ms] | base[ms] |  ratio   |
-------------------------------------------------------------------------------
frame_reindex_upcast                         |  12.3383 |  12.7693 |   0.9662 |
frame_reindex_both_axes                      |  36.2797 |  36.2826 |   0.9999 |
frame_reindex_both_axes_ix                   |  34.7884 |  34.7476 |   1.0012 |
frame_reindex_axis1                          | 555.0433 | 553.5540 |   1.0027 |
frame_reindex_axis0                          |  87.8770 |  82.8171 |   1.0611 |
reindex_fillna_pad                           |   0.6303 |   0.5744 |   1.0974 |
reindex_frame_level_align                    |   0.6430 |   0.5836 |   1.1017 |
reindex_fillna_backfill                      |   0.6286 |   0.5697 |   1.1035 |
reindex_frame_level_reindex                  |   0.5973 |   0.5407 |   1.1048 |
reindex_fillna_pad_float32                   |   0.5320 |   0.4800 |   1.1083 |
reindex_fillna_backfill_float32              |   0.5307 |   0.4773 |   1.1119 |
dataframe_reindex                            |   0.4213 |   0.3650 |   1.1541 |
frame_reindex_columns                        |   0.3730 |   0.3120 |   1.1954 |
reindex_multiindex                           |   1.4537 |   1.1006 |   1.3208 |
reindex_daterange_pad                        |   1.2333 |   0.6417 |   1.9221 |
reindex_daterange_backfill                   |   1.2383 |   0.6430 |   1.9258 |
-------------------------------------------------------------------------------
Test name                                    | head[ms] | base[ms] |  ratio   |
-------------------------------------------------------------------------------

Ratio < 1.0 means the target commit is faster then the baseline.
Seed used: 1234

Target [661adc5] : PERF: calling get_indexer twice when a specialized indexer (e.g. pad) could be called instead
Base   [8c0a34f] : RLS: set released to True, edit release dates