It's very easy to accidentally create O(n^2) code. For example, take a look at the test case added here: https://github.com/google/guava/commit/4e41d621c3f413e

It's very easy to accidentally create O(n^2) code. For example, take a look at the test case added here: https://github.com/google/guava/commit/4e41d621c3f413eb31da2d31b6c9d9713cd851f6 https://github.com/google/guava/commit/4e41d621c3f413eb31da2...