Yes, it's called 'file buffer' and is done by your OS.

Of course, if you files are large, or if you use up all of your memory otherwise, the files may expire from your cache before you use them again.

Perhaps the better way is read in the files one by one, then loop over all the queries per file.

In reply to Re: Caching files question by JavaFan
in thread Caching files question by vit

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