Perhaps it was one of these two?
https://blogs.msdn.microsoft.com/vcblog/2017/09/11/two-phase...
https://blogs.msdn.microsoft.com/vcblog/2015/09/25/rejuvenat...
https://blogs.msdn.microsoft.com/vcblog/2017/09/11/two-phase...
https://blogs.msdn.microsoft.com/vcblog/2015/09/25/rejuvenat...