NAME
    Bench - Benchmark running times of Perl code

VERSION
    version 0.09

SYNOPSIS
     # time the whole program
     % perl -MBench -e'...'
     0.0123s

     # basic usage of bench()
     % perl -MBench -e'bench sub { ... }'
     100 calls (58548/s), 0.0017s (0.0171ms/call)

     # get bench result in a variable
     % perl -MBench -E'my $res = bench sub { ... }'

     # specify bench options
     % perl -MBench -E'bench sub { ... }, 100'
     % perl -MBench -E'bench sub { ... }, {n=>-5}'
     304347 calls (60665/s), 5.017s (0.0165ms/call)

     # use Dumbbench as the backend
     % perl -MDumbbench -MBench -E'bench sub { ... }'
     % perl -MBench -E'bench sub { ... }, {dumbbench=>1, dumbbench_options=>{...}}'
     Ran 26 iterations (6 outliers).
     Rounded run time per iteration: 2.9029e-02 +/- 4.8e-05 (0.2%)

     # bench multiple codes
     % perl -MBench -E'bench {a=>sub{...}, b=>sub{...}}, {n=>-2}'
     % perl -MBench -E'bench [sub{...}, sub{...}]'; # automatically named a, b, ...
     b: 100 calls (5357/s), 0.0187s (0.1870ms/call)
     a: 100 calls (12120/s), 0.0083s (0.0825ms/call)
     Fastest is a (2.267x b)

DESCRIPTION
    This module is an alternative to Benchmark. It provides some nice
    defaults and a simpler interface. There is only one function, bench(),
    and it is exported by default. If bench() is never called, the whole
    program will be timed.

    This module can utilize Dumbbench as the backend.

FUNCTIONS
  bench SUB(S)[, OPTS] => RESULT
    Run Perl code and time it. Exported by default. Will print the result if
    called in void context. SUB can be a coderef for specifying a single
    sub, or hashref/arrayref for specifying multiple subs.

    Options are specified in hashref OPTS. Available options:

    *   n => INT

        Run the code "n" times, or if negative, until at least "n" seconds.

        If unspecified, the default behaviour is to run at most 1 second or
        100 times.

    *   dumbbench => BOOL

        If 0, do not use Dumbbench even if it is available. If 1, require
        and use Dumbbench. If left undef, will use Dumbbench if it is
        already loaded.

    *   dumbbench_options => HASHREF

        Options that will be passed to Dumbbench constructor, e.g.
        {target_rel_precision=>0.005, initial_runs=>20}.

SEE ALSO
    bench, command-line interface for this module

    Benchmark

    Dumbbench

AUTHOR
    Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2012 by Steven Haryanto.

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