Should I expect Comet to be this slow?
- by Chad Johnson
I have the following in a Rails controller:
def poll
records = []
start_time = Time.now.to_i
while records.length == 0 do
records = Something.uncached{Something.find(:all,
:conditions => { :some_condition => false})}
if records.length > 0
break
end
sleep 1
if Time.now.to_i - start_time >= 20
break
end
end
responseData = []
records.each do |record|
responseData << {
'something' => record.some_value
}
# Flag message as received.
record.some_condition = true
record.save
end
render :text => responseData.to_json
end
and then I have Javascript performing an AJAX request. The request sits there for 20 seconds or until the controller method finds a record in the database, waiting. That works.
function poll() {
$.ajax({
url: '/my_controller/poll',
type: 'GET',
dataType: 'json',
cache: false,
data: 'time=' + new Date().getTime(),
success: function(response) {
// show response here
},
complete: function() {
poll();
},
error: function() {
alert('error');
poll();
}
});
}
When I have 5 - 10 tabs open in my browser, my web application becomes super slow.
Is this to be expected? Or is there some obvious improvement(s) I can make?
