tibbe/unordered-containers — pull request #37 by bjin (2012-03-26 02:41:22+00:00)
Title: change pattern match order in unionArrayBy

* Benchmark

~~~
mean: 318.8765 us, lb 316.7192 us, ub 321.4764 us, ci 0.950
std dev: 12.15109 us, lb 9.980074 us, ub 15.77856 us, ci 0.950
~~~

~~~
mean: 283.3417 us, lb 281.6590 us, ub 285.5163 us, ci 0.950
std dev: 9.735885 us, lb 7.903786 us, ub 12.89564 us, ci 0.950
~~~