PerlIO::mmap(3perl) - Man pages

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

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
       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;".

perl v5.40.1                       2026-08-30               PerlIO::mmap(3perl)

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