bitcoin/bitcoin — pull request #4413 by laanwj (2014-06-25 12:02:45+00:00)
Title: Use boost::unordered_map in CCoinsView

As we are not dependent on the ordering, a hash map could improve performance here. As suggested by @sipa.

Consists of a first commit which makes the type easier to change - and should be easy to merge - and a second commit that actually changes the type. This needs benchmarking and extensive testing.