由于内存系统和指令集设计的特性，用于复制内存的最佳通用例程的执行速度通常比用于复制特定长度的代码慢。

Because of the nature of memory systems and instruction-set designs, the best generic routine to copy memory is rarely as fast as code written to copy a particular length.

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固定长度的记录要优于可变长度的记录，因为 DB2 代码专门为处理固定长度的记录进行优化。

Fixed-length records are preferred over varying length records, because the DB2 code is optimized for processing fixed-length records.

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在注释器代码中确保创建注释时不超过特定长度是非常有用的。

It may be useful to ascertain in the annotator code that a specific length may not be exceeded in the created annotations.

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