pydata/pandas — pull request #5802 by jreback (2013-12-30 22:20:36+00:00)
Title: PERF: fix infer_dtype to properly infer a Series (GH5801)

closes #5801

```
------------------------------------------------------------------------------
Test name | head[ms] | base[ms] | ratio |
-------------------------------------------------------------------------------
timestamp_ops_diff2 | 21.7124 | 2472.3583 | 0.0088 |
-------------------------------------------------------------------------------
Test name | head[ms] | base[ms] | ratio |
-------------------------------------------------------------------------------

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

really though this was in their before....oh well