就时间和空间而言，共享内存可能是所有现代操作系统都具备的最高效的进程间通信通道。
In terms of time and space, Shared memory is probably the most efficient inter-process communication channel provided by all modern operating systems.
大多数现代的非 64 位系统都能够创建 36 位的地址空间，从而产生 64 GB 的可寻址内存。
Most modern non-64-bit systems have the ability to create an address space of 36 bits, yielding 64 GB of addressable memory.
现代的处理器在它们的内存模型上有着很大的不同；JMM 应该能够适合于实际的尽可能多的体系结构，而不会以牺牲性能为代价。
Modern processors differ substantially in their memory models; the JMM should accommodate as many possible architectures as practical, without sacrificing performance.
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