JavaScript based diff utility [closed]
I completely rebuilt the jsdifflib utility for speed. Since my version does not require DOM access it at least 4.5 times faster, and it is also extended to highlight character differences in each line.
http://prettydiff.com/diffview.js
You can test this out with the online tool directly at http://prettydiff.com/
jsdifflib inline mode comparison, try tweaking the context size to display just the desired window of change you want. There's a demo here