Thanks for the response, I think my original email basically outlined my issue, but I will break it down.

If 10 people visit my page at the moment, and the page has to retrieve database/memcached info for the 10 people, and it takes 1 second to do all the pre-work to load the page, then each of those requests for each person, is done separately, taking a total of 10 seconds for the last person to retrieve their data, since it has to wait for each other process to finish before attending to the next person.

At a basic level in nodejs, you do this (as an example):

router.get('/', function (req, res, next) {
   Post.find(function(err, Patients) {
    if (err) { return next(err) }
    res.json(People)
   },'Firstname Surname')
})

And although this is per session blocker in node, it still allows other sessions to continue.
I want to know how to achieve this or a similar effect in Dancer2. Or, do I just look at it as an issue with Perl and solve it through something like AnyEvent::Util::fork_call

David

On Wed, Nov 18, 2015 at 12:32 AM, Rick Leir <richard.leir@canadiana.ca> wrote:

On Tue, Nov 17, 2015 at 7:00 AM, <dancer-users-request@dancer.pm> wrote:

    delayed {
      my $TextToWrite = ReturnText();
      sleep(10); # Do something that takes a few seconds
      content "$TextToWrite";
      done;
   };

The sleep call will always cause blocking, even a sleep(0). Likewise a flush. In the sense that there is a context switch to some other thread or process. 

How are you testing whether it is blocking? Sorry, I do not know what you are trying to do.

Linux will not schedule a cpu intensive task to the exclusion of I/O. You can affect its scheduling using nice:
http://stackoverflow.com/questions/2012852/control-a-perl-scripts-cpu-utilization

If you really want nonblocking then you can look at nice for io
http://linux.die.net/man/1/ionice

or spawn a C program with pthreads and freeze your screen!

cheers -- Rick

_______________________________________________
dancer-users mailing list
dancer-users@dancer.pm
http://lists.preshweb.co.uk/mailman/listinfo/dancer-users

_______________________________________________
dancer-users mailing list
dancer-users@dancer.pm
http://lists.preshweb.co.uk/mailman/listinfo/dancer-users