Para(3) -- Perl lib to run parallel jobs
========================================
## SYNOPSIS
use Para;
my $p = Para->new(
job => sub { sleep 1; print $_[0] x 10 . "\n" },
callback => sub { print shift },
jobs => 10,
);
$p->to_queue(0..9);
$p->run;
## DESCRIPTION
Above example shall run in about 1s time.
Pass a job as a code reference. Sub shall take a single parameter
and print one output to STDOUT, and optionally indicate an exit status
with a return value.
Optional parameters to new:
* callback: if missing, get results using $p->results
* size: max output size of job in bytes, default 4096
* jobs: max number of parallel jobs, default 1
Pass list of job inputs to to_queue().
Call run() to process jobs, it will call callback for each result, otherwise
use $p->results afterwards.
## INTERNALS
Para forks a process for each job, gets results from them via single
Unix domain socket in SOCK_SEQPACKET mode, guaranteeing message integrity.