It's the "stop-the-world" pauses that are problematic and that we've been talking about. Single-thread pauses are a fact of life, completely unavoidable with an

It's the "stop-the-world" pauses that are problematic and that we've been talking about. Single-thread pauses are a fact of life, completely unavoidable with any dynamic memory allocation system even without GC (e.g. when malloc searches the free-lists).