PerlIO::mmap(3perl)

PerlIO::mmap3perl

Memory mapped io

Usage

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

Overview

This layer does "read" and "write" operations by mmap()ing the file if possible, 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;".

Releases

7 releases since Debian 8 (Jessie); the text changed 6 times.

  1. 8
  2. 9
  3. 10
  4. 11
  5. 12
  6. 13
  7. Arch

From perl 5.44.0-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.