brannondorsey/vectorpivideo — pull request #1 by bakercp (2014-04-15 05:17:15+00:00)
Title: Return arrays by const ref.  No copies.

Each and every time you were getting words via `getWords()` you were copying and then destroying the entire array. This was even happening when you use `getWords().size()` ... a full copy.

After profiling, I found that 60% of your program's time was spent on this copy / destruction. Returning by const reference prevents this copy from happening by providing a direct read-only reference to the underlying vector.