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 v5.34.0 2025-04-08 PerlIO::mmap(3perl)
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