Games don't tend to have very deep callstacks. And if a game cared about performance also wanted to use GC, it would probably try to run the GC at the end of a frame when there is little on the stack.

Yeah UE GC safepoints at end of tick where there is no stack. That’s a common trick in systems that have both GC and ticking.

To be fair, FUGC doesn’t currently let you do that. The GC runs in a separate thread and soft handshakes at various points, which cause your game thread to react at poll checks and exits that might not be at end of tick.

But I could add a feature that lets you to force handshake responses to be at end of tick! That sounds like a good idea

FUGC runs the GC in a separate thread and you don’t have a lot of control over when it interrupts.