NAME

Plack::Middleware::Profiler::NYTProf - Middleware for Profiling a Plack App

SYNOPSIS

    use Plack::Builder;

    builder {
        enable 'Profiler::NYTProf';
        [ '200', [], [ 'Hello Profiler' ] ];
    };

DESCRIPTION

Plack::Middleware::Profiler::NYTProf helps you to get profiles of Plack App.

Enabling this middleware will result in a huge performance penalty. It is intended for use in development only.

Read Devel::NYTProf documentation if you use it for production. Some options of Devel::NYTProf is useful to reduce profling overhead. See MAKING_NYTPROF_FASTER section of NYTProf's pod.

OPTIONS

NOTE that some options expect a code reference. Maybe, you feel it is complicated. However that will enable to control them programmably. It is more useful to your apps.

enable_profile

default

    sub { 1 }

Use code reference if you want to enable profiling programmably This option is optional.

enable_reporting

default

    1

Devel::NYTProf doesn't generate HTML profiling report if you set 0 to this option. This option is optional.

env_nytprof

Warning: This option is DEPRECAED from 0.16. Use NYTPROF environment variable.

This option set to $ENV{NYTPROF}. See Devel::NYTProf: NYTPROF ENVIRONMENT VARIABLE section. By default, Plack::Middleware::Profiler::NYTProf loads Devel::NYTProf lazily.

default

    'start=no:sigexit=int'

NOTE that Devel::NYTProf expects to be loaded in compile phase. It would be better to load manually like this

    # in your app.psgi
    BEGIN {
        use Plack::Middleware::Profiler::NYTProf;
        $ENV{NYTPROF} = 'start=no:sigexit=int:stmts=0:savesrc=0';
        Plack::Middleware::Profiler::NYTProf->preload;
    }

If you set enable_reporting TRUE (you get a profile for each request), you should NOT load Devel::NYTProf manually.

profiling_result_dir

NYTProf write profile data to this directory. The default directory is current directory. This option is optional.

default

    sub { '.' }

profiling_result_file_name

The file name about profile. This options is optional.

default

    sub { my $id = $_[1]->{PROFILE_ID}; return "nytprof.$id.out"; }

generate_profile_id

Generate ID for every profile. This option is optional.

default

    sub { return $$ . "-" . Time::HiRes::gettimeofday; } )

nullfile

The file name of dummy profile for NYTProf. This option is optional.

default

    'nytprof.null.out'

before_profile

This is the hook before profiling This option is optional.

after_profile

This is the hook after profiling This option is optional.

HOW TO SEE REPORT

  $ plackup -MPlack::App::Directory -e 'Plack::App::Directory->new({root => "./report"})->to_app'

SOURCE AVAILABILITY

This source is in Github:

  http://github.com/dann/p5-plack-middleware-profiler-nytprof

CONTRIBUTORS

Many thanks to: bayashi

AUTHOR

Takatoshi Kitano <kitano.tk {at} gmail.com> Dai Okabayashi

SEE ALSO

Devel::NYTProf

LICENSE

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