`WP_Text_Diff_Renderer_Table` is used to generate the diff view in revisions, but there were some cases that could cause it to take excessive amounts of time to run.
Some noteable cases include:
- When a large number of new lines were inserted in the middle of the post from one revision to the next.
- When both revisions contain >100 lines.
- When either revision contains a lot of long lines.
In one extreme test case, the diff view took over a minute to generate. With this change, it now takes less than a second.
Merges [43775] from the 5.0 branch to trunk.
Fixes#35667.
git-svn-id: https://develop.svn.wordpress.org/trunk@44129 602fd350-edb4-49c9-b593-d223f7449a82
8a54057af7