同步动态随机存储器（SDRAM）具有高速，大容量，价格低廉等优点，因而成为缓冲存储器的首选，但是SDRAM控制时序比较复杂，不能与DSP直接接口，这极大地限制了它的广泛应用。

The SDRAM has become the chief choice of the buffer storage because of its high speed, great capacity, and low price; but due to its complex control timing, it cannot directly interface with DSP.

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当前，编译器可根据需要动态增加堆，最多可增加到总堆大小限制，并且只需要固定大小的缓冲区即可构造预编译头。

Currently, the compiler dynamically grows the heaps as necessary up to a total heap size limit, and requires a fixed-size buffer only to construct precompiled headers.

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