应用接收到客户端的第一个请求时，加载和执行合适的块。
When the client's first request is received, the appropriate chunk is loaded and executed.
内存分配由Database . malloc (int size)执行，它首先确定用于提供所请求内存的块的最小数目。
The memory allocation is performed by Database.malloc (int size), which starts by determining the minimum number of blocks needed to provide the requested memory.
客户端的第二个请求到达时，再加载、执行处理该请求的块。
When the client’s second request arrives, the chunk that handles it is loaded and executed.
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