Sure, Unix (and I'd be amazed if there are modern OSses that don't do this) caches files. But it will do so regardless of the program that uses the file. It's not going to say, "Ooooh, this file is opened by a process called 'grep', I better cache the results, and here, this file is opened by dirty sticking little perl, I'm not going to keep that one around!".

In reply to Re^4: search array for closest lower and higher number from another array by JavaFan
in thread search array for closest lower and higher number from another array by bigbot

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