# Alpakka Google Pub Sub
**URL:** https://discuss.akka.io/t/alpakka-google-pub-sub/2166
**Category:** Akka Streams & Alpakka
**Created:** [September 19, 2018, 9:47am UTC](https://discuss.akka.io/t/alpakka-google-pub-sub/2166 "2018-09-19T09:47:16Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@damianbl](https://discuss.akka.io/u/damianbl)
#### Post date: [September 19, 2018, 9:47am UTC](https://discuss.akka.io/t/alpakka-google-pub-sub/2166/1 "2018-09-19T09:47:16Z")
Hi,
I have the following issue.
I integrate with Google Pub Sub using Alpakka. It works flawlessly when I work with Google Cloud Pub Sub.
However, for the developers machines I want to integrate with Google Pub Sub Emulator. Obviously this is also perfectly supported by Alpakka.
The only issue I have is the really high CPU usage of the local Google Pub Sub Emulator (I run it in the Docker container).
I think this is the result of continuous HTTP pulling from the `GooglePubSubSource`.
I see in the `GooglePubSubSource` that it pulls the API constantly if no messages are fetched.
I mean `fetch` function here:
>
On my side I wrap the `GooglePubSub` source in `RestartSource`. I tried to throttle on my side on this source but it does not help.
To be able to use Alpakka Google Pub Sub at all I need to decrease the CPU usage on developers machines.
Do you have any suggestions?
I would really appreciate it.
Thanks,
Damian.
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### Author:  [@damianbl](https://discuss.akka.io/u/damianbl)
#### Post date: [September 21, 2018, 7:09am UTC](https://discuss.akka.io/t/alpakka-google-pub-sub/2166/2 "2018-09-21T07:09:07Z")
For now I resolved it in a away that I implemented a simple PubSub emulator on my side to be used on developers machines so I do not use the Alpakka PubSub with Google PubSub Emulator locally.
However, I’d love to remove my code and use Google PubSub Emulator as intended.