file-backed memory mapping

File-backed memory mapping is a process where a computer program links a file on disk directly to its memory space. This allows the program to access and modify the file’s contents as if they were part of its own memory, without reading or writing through traditional I/O operations. It’s efficient because it lets the system handle data transfer automatically, reducing overhead. Changes made in memory are synchronized with the file on disk, enabling faster file access and modifications, which is especially useful for working with large files or sharing data between programs.