Parrot implements trace gc and YAP6 implements refcount gc. Trace gc may be more efficient and more safe, but is not deterministic.

There are ways to add determinism to tracing GCs. Escape analysis is useful for this.

In reply to Re^3: YAP6: A p5 approach to p6 by chromatic
in thread YAP6: A p5 approach to p6 by ruoso

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