How does file mapping help in inter-process communication by allowing processes to share memory-mapped files?

[ProfRon]

You ever wonder how apps on your computer chat without slowing everything down? File mapping steps in like a sneaky bridge. It maps a file straight into memory for different processes to peek at. You and I both know processes usually hoard their own memory spots. But with this trick, they share the same chunk without copying junk around. Imagine two buddies passing notes in class. One writes on a shared notepad. The other reads it instantly. No yelling across the room. That's file mapping for you. Processes tweak the mapped file. Changes show up for everyone using it. Super quick swaps happen. No need for pipes or messages flying back and forth. It just feels natural. You load the file once. Everyone accesses the same view. Conflicts? The system handles locks to keep things smooth. I tried it in a project once. Blew my mind how zippy it got.

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