Comment 1 for bug 604277

Five years later, it feels like rendering another twice as many lines of diff should not be an issue for a modern browser. So I think a quick fix might be to simply increase the threshold from 5000 to 10000. I just hit this with a ~7500 line branch.

For what it's worth, the largest diff I've seen (or rather, not seen) was ~40000 lines; merging a large feature branch into MAAS.