For example, a compiler may choose to optimize a loop index variable by storing it in a register, or the cache may delay flushing a new value of a variable to main memory until a more opportune time.

例如，编译器为了优化一个循环索引变量，可能会选择把它存储到一个寄存器中，或者缓存会延迟到一个更适合的时间，才把一个新的变量值存入主存。

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The latter three cache and optimize the byte code, providing for even greater speedups.

后三类加速器能够缓存和优化字节码，这为系统提供了更多的速度提升。

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This technique focuses on how best to optimize the usage of cache in order to reduce the number of times the system must retrieve data and place it in cache to perform a given set of operations.

这种技术的主要目标是尽可能优化缓存的使用，减少系统在执行给定的操作时必须获取数据并把数据放进缓存的次数。

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There are so many things that can slow web apps down, and even if you cache and optimize your data feeds, move the heavy lifting from the server to the client and all of the other things that smart app developers have been doing, you still will bump into the limitations of the browser.

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