---
name: "HTTP::Headers::Fast"
section: "3pm"
platform: "linux"
package: "libhttp-headers-fast-perl"
version: "0.22-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/HTTP::Headers::Fast"
---

# HTTP::Headers::Fast(3pm)

faster implementation of HTTP::Headers

## NAME

HTTP::Headers::Fast - faster implementation of HTTP::Headers

## SYNOPSIS

```
  use HTTP::Headers::Fast;
  # and, same as HTTP::Headers.
```

## DESCRIPTION

HTTP::Headers::Fast is a perl class for parsing/writing HTTP headers.

The interface is same as HTTP::Headers.

## WHY YET ANOTHER ONE?

HTTP::Headers is a very good. But I needed a faster implementation, fast  =)

## ADDITIONAL METHODS

- as\_string\_without\_sort

  as\_string method sorts the header names.But, sorting is bit slow.

  In this method, stringify the instance of HTTP::Headers::Fast without sorting.

- psgi\_flatten

  returns PSGI compatible arrayref of header.

  ```
      my $headers:ArrayRef = $header->flatten
  ```

- psgi\_flatten\_without\_sort

  same as flatten but returns arrayref without sorting.

## @ISA HACK

If you want HTTP::Headers::Fast to pretend like it's really HTTP::Headers, you can try the following hack:

```
    unshift @HTTP::Headers::Fast::ISA, 'HTTP::Headers';
```

## BENCHMARK

```
    HTTP::Headers 5.818, HTTP::Headers::Fast 0.01
    -- push_header
            Rate orig fast
    orig 144928/s   -- -20%
    fast 181818/s  25%   --
    -- push_header_many
            Rate orig fast
    orig 74627/s   -- -16%
    fast 89286/s  20%   --
    -- get_date
            Rate orig fast
    orig 34884/s   -- -14%
    fast 40541/s  16%   --
    -- set_date
            Rate orig fast
    orig 21505/s   -- -19%
    fast 26525/s  23%   --
    -- scan
            Rate orig fast
    orig 57471/s   --  -1%
    fast 57803/s   1%   --
    -- get_header
            Rate orig fast
    orig 120337/s   -- -24%
    fast 157729/s  31%   --
    -- set_header
            Rate orig fast
    orig  79745/s   -- -30%
    fast 113766/s  43%   --
    -- get_content_length
            Rate orig fast
    orig 182482/s   -- -77%
    fast 793651/s 335%   --
    -- as_string
            Rate orig fast
    orig 23753/s   -- -41%
    fast 40161/s  69%   --
```

## AUTHOR

```
    Tokuhiro Matsuno E<lt>tokuhirom@gmail.comE<gt>
    Daisuke Maki
```

And HTTP::Headers' originally written by Gisle Aas.

## THANKS TO

Markstos

Tatsuhiko Miyagawa

## SEE ALSO

HTTP::Headers

## LICENSE

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