Oracle 性能相对较低，因为存在不必要的预先分配的表。

Oracle performance is slower because of unwanted preallocated tables.

youdao

请注意，反映每个日志文件的大小主要是预先分配的空间，一些日志头控制字符除外。

Note that the size reflected for each log file is mostly pre-allocated space except for some log header control characters.

youdao

通过一个预先分配的 Runnable 对象和一个单独的作用域，在错误发生时，您就应该总是能够报告问题，而无需使用任何内存。

With a preallocated Runnable object and a separate scope, you should always be in a position to report a problem without using any memory in the context the error occurred.

youdao