ruby-mqtt 2x slower than paho-mqtt

[rgaufman]

Hi there,

I'm comparing different ruby mqtt clients, I have this code:

client = MQTT::Client.new(username: 'testuser', password: 'testpasswd', client_id: "client_#{rand(1..1_000_000)}", host: '127.0.0.1', )
client.connect()

count = 0
loop do
  count += 1
  i = rand(1..10)

  topic = "to/timebox#{i}/cameras"
  msg = "message #{count} #{Time.now} for timebox#{i}"
  client.publish(topic, msg, true, 1)
end

Here is a version using paho-mqtt

$client = PahoMqtt::Client.new(username: 'testuser', password: 'testpasswd', client_id: "client_#{rand(1..1_000_000)}")
$client.connect('127.0.0.1', 1883)

$count = 0
def send_message
  $count += 1
  i = rand(1..$total)

  topic = "to/timebox#{i}/cameras"
  msg = "message #{$count} #{Time.now} for timebox#{i}"
  $client.publish(topic, msg, true, 1)
end

$client.on_puback { send_message } # QOS1
send_message
loop { sleep 1 } # to keep process running

I used pv to calculate how many messages are being received per second and I'm getting:

• ruby-mqtt: 92 / sec
• paho-mqtt: 180 /sec

I prefer the syntax of ruby-mqtt and it appears to be better maintained, but any ideas why ruby-mqtt is nearly 2x slower?

[njh]

No sorry, I am not certain why there is such a different in publish speed - it must have something to do with ruby-mqtt being synchronous/using threads. paho-mqtt borrowed the packet parsing code from ruby-mqtt, so it is unlikely to be that.

[njh]

@rgaufman please can you test to see if @tenderlove's improvements fix your performance problems?

[dentarg]

Maybe just close this issue seeing https://github.com/RubyDevInc/paho.mqtt.ruby hasn't had any updates in main since Oct 4, 2018?