PerlIO::mmap(3)		Perl Programmers Reference Guide	 PerlIO::mmap(3)

NAME
     PerlIO::mmap - Memory mapped IO

SYNOPSIS
      open my $fh, '<:mmap', $filename;

DESCRIPTION
     This layer does "read" and "write" operations by mmap()ing the file if pos-
     sible, but falls back to the default behavior if not.

IMPLEMENTATION NOTE
     "PerlIO::mmap" only exists to use XSLoader to load C code that provides
     support for using memory mapped IO. One does not need to explicitly "use
     PerlIO::mmap;".

perl v5.44.0			   2026-05-14			 PerlIO::mmap(3)