We can probably agree that we don't know about the impact on a large multimedia application written in D. What you can communicate is: Create a @nogc thread routine and don't register it with the GC to write real-time VSTs.
Guillaume did a good job, taking the GC out of the real-time thread. It's D, it is a bit of a hack, it's the correct way to do it and works. But I don't see it debunking any myths about GC and real time... A) It doesn't mix them to begin with. B) "Realtime GCs" are a thing. D's GC is not optimized for such a use case. C) With a small heap it doesn't matter. (We need more complex multimedia projects.) What I've seen is a program, a non-linear video editor, called PowerDirector that pauses for seconds every now and then. These pauses reminded me a lot of GC pauses, but I can't be sure. Although memory use is less after the pause, it could also be a cleaning of caches. In any case quite a few of these applications try to make "good use" of available RAM, causing constant memory pressure. Now there has been so much talk about the GC that I don't even know what the filter does! -- Marco