map（映射）和reduce（缩减） 源自函数式编程中的函数名，但是这个应用程序的核心功能是数据缩减。
Map and reduce are named after functions in functional programming but provide the core capability for data reduction.
我们开始了通常的内存占用缩减过程：建立测试环境、规定可再现的测试、启动剖析程序、运行测试、分析数据、查找调优的机会。
We began our usual footprint-reduction procedure: set up the test environment, specify a reproducible test, fire up the profiler, run the test, analyze the data, and look for tuning opportunities.
我们开始了通常的内存占用缩减过程：建立测试环境、规定可再现的测试、启动剖析程序、运行测试、分析数据、查找调优的机会。
We began our usual footprint-reduction procedure: set up the test environment, specify a reproducible test, fire up the profiler, run the test, analyze the data, and look for tuning opportunities.
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