CPAN::Groonga

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Step
     max_workers => 8,                # Default 'auto'
     ch

ecode_sereal );
       # use CBOR::XS qw( encode_cbor decode_cbor );
       # use JSON::XS qw( encode_json decode_json );
       #
       # use MCE;

    gather => \@a,                      # Default 

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE
     max_workers => 4,                  # Default 1
     chunk_size 

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Flow
     max_workers => 8,                # Default 'auto'
     ch

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Loop
     max_workers => 4,                # Default 'auto'
     ch

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Grep
     max_workers => 4,                # Default 'auto'
     ch

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Stream
     max_workers => 8,                # Default 'auto'
     

 encode_sereal decode_sereal );
 use CBOR::XS qw( encode_cbor decode_cbor );
 use JSON::XS qw( encode_json decode_json );

 use MCE::Map
     max_workers => 4,                # Default 'auto'
     chu