[pkolaczk]

"Also, global GC often requires 2x-3x the memory footprint of working memory which is extremely wasteful for the resource constrained domains that C++ is often used in."

Memory fragmentation in manual memory management often comes at a similar or higher cost, which is often "forgotten" and neglected, because it is hidden:

https://bugzilla.mozilla.org/show_bug.cgi?id=666058#c31

And fragmentation may grow over time much more than the typical GC overhead. Then you have to do a "forced GC" that is restarting the application. Often happens to my phone or browser. I'm not sure if it is more due to fragmentation or more due too plain old memory leaks.