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Twiggy - AnyEvent HTTP server for PSGI


  twiggy --listen :8080

See twiggy -h for more details.

  use Twiggy::Server;

  my $server = Twiggy::Server->new(
      host => $host,
      port => $port,



Twiggy is a lightweight and fast HTTP server with unique features such as:


Can run any PSGI applications. Fully supports psgi.nonblocking and psgi.streaming interfaces.


This server uses AnyEvent and runs in a non-blocking event loop, so it's best to run event-driven web applications that runs I/O bound jobs or delayed responses such as long-poll, WebSocket or streaming content (server push).

This software used to be called Plack::Server::AnyEvent but was renamed to Twiggy.

Fast header parser

Uses XS/C based HTTP header parser for the best performance. (optional, install the HTTP::Parser::XS module to enable it; see also Plack::HTTPParser for more information).

Lightweight and Fast

The memory required to run twiggy is 6MB and it can serve more than 4500 req/s with a single process on Perl 5.10 with MacBook Pro 13" late 2009.

Superdaemon aware

Supports Server::Starter for hot deploy and graceful restarts.

To use it, instead of the usual:

    plackup --server Twiggy --port 8111 app.psgi

install Server::Starter and use:

    start_server --port 8111 -- plackup --server Twiggy app.psgi


The following environment variables are supported.


Set to true to enable debug messages from Twiggy.


This module is licensed under the same terms as Perl itself.


Tatsuhiko Miyagawa

Tokuhiro Matsuno

Yuval Kogman

Hideki Yamamura

Daisuke Maki


Plack AnyEvent Tatsumaki