The key to this optimization is that by delaying the allocation of physical blocks until they need to be written to the disk, more blocks are present to allocate and write in contiguous blocks.
这种优化的关键是延迟物理块的分配，直到需要在磁盘上写这些物理块时才对其进行分配并写到相邻的块。
The first is a general-purpose allocation and can serve requests for any number of contiguous chunks.
第一个分配程序是通用分配，可以满足针对任何数量的连续内存块的请求。
This entry lets us know that there was an allocation failure, which presents itself when there is not enough contiguous space in the heap to allocate the object.
通过这个条目，我们能够知道有一个分配失败，当heap内没有足够的连续空间可以分配给对象时，就会发生分配失败。
If XFS hadn't delayed its allocation decision, it may have unknowingly written the data into multiple non-contiguous chunks, reducing write performance significantly.
如果XFS没有延迟它的分配决定，那么，它也许已经不知不觉地将数据写到了多个非相邻块中，从而显著地降低了写性能。
Allocation of contiguous blocks of airtime for data or airtime transmission can lead to large maximum service intervals for an application stream.
为数据分配连续的传输时间块可使应用流得到较大的最大服务间隔。
Dynamic memory allocation (on the heap) is not necessarily contiguous.
动态内存分配(堆上)也不一定是连续的。
Dynamic memory allocation (on the heap) is not necessarily contiguous.
动态内存分配(堆上)也不一定是连续的。
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