Memory-mapped files

Memory-mapped files are a way for a computer to access and manipulate files using memory instead of regular file input/output operations. When a file is memory-mapped, the operating system maps the file's contents directly into the computer's memory. This allows programs to read from and write to the file as if they were working with regular memory, making operations faster and more efficient. It’s particularly useful for large files or shared data because multiple processes can access the same data simultaneously without much overhead.