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High TTFB standard deviation using WebPageReplay and Android
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Description

We have had a couple of alerts for high standard variation of TTFB for our Android tests using WebPageReplay:

Screenshot 2021-04-05 at 19.42.51.png (888×2 px, 187 KB)

That is really strange since it should just revert the traffic back to the host machine. Let me go through the logs and see if I can track down what's wrong.

Event Timeline

Looking at a specific run it looks like this:

Screenshot 2021-04-06 at 21.35.35.png (296×2 px, 332 KB)

compared to a normal run:

Screenshot 2021-04-06 at 21.35.47.png (254×1 px, 295 KB)

It adds 2,5 seconds of wait time.

I could see Splashtop streamer (?) and Vysor running. I think they where left by the Kobiton team when we they updated the server the last time. I'll ask if I can close them down.

The Mac mini was moved and now its looks better. Here's the standard deviation over seven days:

Screenshot 2021-05-19 at 13.30.01.png (686×2 px, 608 KB)