Handy elisp for profiling code and summing function time by function (unlike the hierarchical profiler-report):
miniblog.
Related Posts
Superb article on building a real time rich text editor: https://ckeditor.com/blog/Lessons-learned-from-creating-a-rich-text-editor-with-real-time-collaboration/
Discusses operational transforms with hierarchical text (e.g. you edit text whilst the other user makes part of it a link) and markers (persistent regions that automatically move when you edit).
Periodically, I look at projects that challenge the status quo in tech. Today: Hierarchical File Systems are Dead http://t.co/uX8lF4DWhw