当view _ rebuild_dir参数指向RAM磁盘时，对重构时间的测试表明性能得到了显著改善。

Testing the rebuild times did, however, show dramatic improvement when the view_rebuild_dir parameter pointed to a ram disk.

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在重构后，所有对这个类中的数字或字符串文字的使用都将指向该字段，而不是指向数字或字符串文字本身。

After the refactoring, all USES of that number or string literal in the class refer to that field, instead of the number or string literal itself.

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