If all the objects in the managed heap survive a collection, then there is no need for memory compaction.
如果托管堆中的所有对象均未被回收，则不需要压缩内存。
The GC can only contract contiguous blocks of memory from the end of the heap, so a compaction might be required to contract the heap.
GC只能收缩从堆末尾开始的连续内存块，因此收缩堆可能需要进行压缩。
In a compaction phase, the objects that are on the heap are consolidated to allow any free memory to gather together and satisfy the current request.
在compaction阶段，heap上的对象会被整合以便将所有空闲空间收集起来满足当前的请求。
Maintaining this compaction head position tends to break down the memory of the material.
保持该压缩头的位置容易把存储的材料分解。
Maintaining this compaction head position tends to break down the memory of the material.
保持该压缩头的位置容易把存储的材料分解。
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