---
name: "Mail::Box::FastScalar"
section: "3pm"
platform: "linux"
package: "perl-mail-message"
version: "4.05-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Mail::Box::FastScalar"
---

# Mail::Box::FastScalar(3pm)

fast alternative to IO::Scalar

## NAME

Mail::Box::FastScalar - fast alternative to IO::Scalar

## SYNOPSIS

```
  my $fh = Mail::Box::FastScalar->new;
  $fh->open(\my $out);
  my $fh = Mail::Box::FastScalar->new(\my $out);
```

## DESCRIPTION

Extremely fast IO::Scalar replacement - over 20x improvement in `getline()` and `getlines()` methods.

Contributed by "Todd Richmond" (`"richmond@proofpoint.com"`)

### Warnings

You cannot modify the original reference between calls unless you `"$obj-"`seek(1, 0)\> to reset the object - VERY rare usage case.

$/ must be `"undef"` or string - "" and \\scalar unimplemented

## SEE ALSO

This module is part of Mail-Message version 4.05, built on April 10, 2026. Website: *http://perl.overmeer.net/mailbox/*

## LICENSE

For contributors see file ChangeLog.

This software is copyright (c) 2001-2026 by Mark Overmeer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.