May 26, 2018
Super-sed - a heavily enhanced version of sed
This is a version of sed based on GNU sed. It is not a version of GNU sed, though.
There are several new features including in-place editing of files, extended regular expression syntax and a few new commands and some bug fixes; see the NEWS file for a brief summary and the ChangeLog for more detailed descriptions of changes.
The biggest note, i think is the huge speed difference, where regular sed might take a few mins, super-sed can take only seconds this is not true in all cases, and sometimes you have modify your regexp syntax, however for the speed increase, it might be worth it.