A "rather slow" is quite debatable. Tracing GC gets speed advantage at the cost of much higher memory and energy usage, unpredictable pauses, cache thrashing, e

A "rather slow" is quite debatable. Tracing GC gets speed advantage at the cost of much higher memory and energy usage, unpredictable pauses, cache thrashing, etc. If you try to make these things equal, tracing can become embarrassingly slow, or even just crash with OOM.