mmap

Mmap, short for "memory mapping," is a technique that allows a computer program to access data stored on a storage device (like a hard drive) as if it were part of the computer’s RAM (working memory). Instead of reading data through slow input-output operations, the program can work directly with the memory, which speeds up data access and manipulation. This method efficiently handles large files or data sets by mapping sections of the file into the program’s address space, simplifying data management and improving performance without manually copying data back and forth.