perldoc > PerlIO::mmap

📖 NAME

PerlIO::mmap - Memory mapped IO

Use Case	Command	Description
📖 Read via mmap	`open my $fh, '<:mmap', $filename;`	Opens a file efficiently using memory-mapped IO for reading.
✍️ Write via mmap	`open my $fh, '>:mmap', $filename;`	Opens a file for writing using memory-mapped IO.
🔄 Graceful fallback	`open my $fh, '<:mmap', $filename;`	Automatically falls back to standard IO if `mmap()` is not supported.

 open my $fh, '