之前提到过存取器访问如何比直接访问慢，这例子说明，某些语言约会定导致不可见的性能问题。
Earlier we talked about how accessors are slower than direct field accesses, so this is an example of a certain language idiom resulting in an "invisible" performance hit.
由于电荷耦合组件能够储存电荷，它们可以当作记忆装置，但比随机存取内存慢。
Because they can store electrical charges, CCDs can be used as memory devices, but they are slower than RAMs.
实例表明，该程序作为一个模型数据提取及模型数据处理平台，解决了海量图形数据存取时容易发生的速度慢、内存释放困难问题。
A case study shows that as a platform of model data reading and model data management, this program solves the problems of lowly speed reading and different to release of EMS memory .
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