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    used to reproduce the same behaviour for the remaining agents, while
    taskset <http://linux.die.net/man/1/taskset> avoids the skew on
    multiprocessor systems.

    The download target is a copy of the Apache documentation
    <http://httpd.apache.org/docs/2.2/> on a local Apache server. The test
    platform configuration:

      * Intel® Core™ i7-2600 CPU @ 3.40GHz with 8 GB RAM;

      * Ubuntu 11.10 (64-bit);

      * Perl v5.16.2 (installed via perlbrew);

      * libcurl/7.28.0 (without AsynchDNS, which slows down
      curl_easy_init()
      <http://curl.haxx.se/libcurl/c/curl_easy_init.html>).

    The script eg/benchmark.pl uses Benchmark::Forking and Class::Load to
    keep UA modules isolated and loaded only once.

        $ taskset 1 perl benchmark.pl --count 100 --parallel 8 --repeat 10
    
                                  Request rate WWW::M LWP::UA L::P::N::C Mojo::UA HTTP::L HTTP::T lftp P::D AE::C::M YADA Furl curl wget LWP::C
        WWW::Mechanize v1.72             534/s     --    -32%       -61%     -63%    -80%    -82% -83% -84%     -85% -86% -94% -95% -97%   -97%
        LWP::UserAgent v6.04             782/s    46%      --       -42%     -46%    -71%    -73% -75% -76%     -77% -79% -92% -93% -95%   -95%
        LWP::Protocol::Net::Curl v0.011 1360/s   154%     74%         --      -6%    -50%    -53% -57% -59%     -61% -64% -86% -88% -91%   -91%
        Mojo::UserAgent v3.82           1450/s   171%     85%         7%       --    -46%    -50% -54% -56%     -58% -62% -85% -87% -91%   -91%
        HTTP::Lite v2.4                 2700/s   405%    245%        98%      86%      --     -7% -14% -18%     -22% -29% -71% -76% -82%   -83%
        HTTP::Tiny v0.025               2910/s   445%    272%       114%     101%      8%      --  -7% -11%     -16% -23% -69% -74% -81%   -81%
        lftp v4.3.1                     3140/s   488%    302%       131%     117%     17%      8%   --  -4%      -9% -17% -67% -72% -80%   -80%
        Parallel::Downloader v0.121560  3280/s   514%    319%       141%     127%     22%     13%   4%   --      -5% -13% -65% -70% -79%   -79%
        AnyEvent::Curl::Multi v1.1      3460/s   548%    342%       155%     139%     28%     19%  10%   5%       --  -9% -63% -69% -77%   -78%
        YADA v0.038                     3790/s   610%    385%       179%     162%     41%     30%  21%  16%      10%   -- -60% -66% -75%   -76%
        Furl v2.01                      9420/s  1663%   1104%       593%     550%    249%    223% 200% 187%     172% 148%   -- -15% -39%   -40%
        curl v7.28.0                   11100/s  1977%   1318%       716%     666%    311%    281% 253% 238%     221% 193%  18%   -- -28%   -29%
        wget v1.12                     15400/s  2777%   1864%      1031%     961%    470%    428% 389% 368%     344% 305%  63%  39%   --    -1%
        LWP::Curl v0.12                15600/s  2818%   1892%      1047%     976%    478%    435% 396% 375%     350% 311%  65%  40%   1%     --
    
        (output formatted to show module versions at row labels and keep column labels abbreviated)

ATTRIBUTES

 allow_dups

    Allow duplicate requests (default: false). By default, requests to the
    same URL (more precisely, requests with the same signature are issued
    only once. To seed POST parameters, you must extend the
    AnyEvent::Net::Curl::Queued::Easy class. Setting allow_dups to true
    value disables request checks.

 common_opts

    "opts" in AnyEvent::Net::Curl::Queued::Easy attribute common to all
    workers initialized under the same queue. You may define User-Agent
    string here.

 http_response

    Encapsulate the response with HTTP::Response (only when the scheme is
    HTTP/HTTPS); a global version of "http_response" in
    AnyEvent::Net::Curl::Queued::Easy. Default: disabled.

 completed

    Count completed requests.

 cv

    AnyEvent condition variable. Initialized automatically, unless you
    specify your own. Also reset automatically after "wait", so keep your
    own reference if you really need it!

 max

    Maximum number of parallel connections (default: 4; minimum value: 1).

 multi

    Net::Curl::Multi instance.

 queue

    ArrayRef to the queue. Has the following helper methods:

 queue_push

    Append item at the end of the queue.

 queue_unshift

    Prepend item at the top of the queue.

 dequeue

    Shift item from the top of the queue.

 count

    Number of items in queue.

 share

    Net::Curl::Share instance.

 stats

    AnyEvent::Net::Curl::Queued::Stats instance.

 timeout

    Timeout (default: 60 seconds).

 unique

    Signature cache.

 watchdog

    The last resort against the non-deterministic chaos of evil lurking
    sockets.