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。

youdao

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。

youdao