G1GC aims for predictable pause times; ZGC targets low-latency.
G1GC divides the heap into regions and collects them incrementally to manage pauses. ZGC uses a concurrent approach to reduce pause times significantly, ideal for low-latency applications. In high-traffic scenarios, ZGC might be preferred for smoother user experiences.
Additional Notes
How does the G1 Garbage Collector differ from ZGC?