fontforge/fontforge.github.com — pull request #24 by kuribas (2014-07-02 15:54:44+00:00)
Title: Modified the algorithm to use a faster plane sweep algorithm.

The plane sweep algorithm has a better complexity ( O((n+m)log n) instead of O(n^2), and scales to a large number of curves. While it is more work to calculate intersections, removing overlap becomes much easier.