We used this at a previous job of mine, back in ~2014.
It was part of a huge push where we spent months focusing primarily on code health and performance. The guy who did this part of the work said it needed a bit of manual intervention to really work, back then, but in the end it helped us eliminate a lot of includes and really speed up compilation.
The very measurable gains also led to new guidelines for how to write our code to try and maintain the speed we'd gained.
It was part of a huge push where we spent months focusing primarily on code health and performance. The guy who did this part of the work said it needed a bit of manual intervention to really work, back then, but in the end it helped us eliminate a lot of includes and really speed up compilation.
The very measurable gains also led to new guidelines for how to write our code to try and maintain the speed we'd gained.