Wouldn't it be better, doing kind of a database approach and build an index first, and then use that index and update it in some way.

采取某种数据库方法并首先构建索引，然后使用该索引并以某种方式更新它不是更好吗？

You're gonna take a while but it found all these files that are somewhere in my file system and since it has built an index already on them, it's much faster.

您需要花一些时间，但它会找到我的文件系统中某处的所有这些文件，并且由于它已经在它们上构建了索引，因此速度要快得多。