> Basically the only solution to the stop the world pause with D is to run two instances of your program and then use IPC even though the language provides a wa

> Basically the only solution to the stop the world pause with D is to run two instances of your program and then use IPC even though the language provides a way to disable the gc. There is a solution to your stated problem that is to deregister Thread 2 to the runtime. No registration -> no stop-the-world for this thread. Thread 2 will not be able to "own" GC things or allocate with the GC but will perfectly be able to use them. I did this in a video game for the audio thread.