Ability to double ping measurement.

[ssamjh]

So in #33 it is mentioned that the ping amount is incorrect, and then the user says it's solved but not explaining how.

I am not very tech savvy, but is there anyway to double the ping amount shown on the page?

Speedtest site: https://speedtest.mineswine.com

[adolfintel]

Try asking him how he solved it. My guess is that it was incorrect server config.

[adolfintel]

...or you can just remove the /2 at line 325 in worker.js

[n-st]

@adolfintel Why do you divide the time by 2 anyway?

[adolfintel]

Because of how HTTP works. When you make a XHR request, here's what typically happens:

• TCP connection is created (1 RTT)
• HTTP request is sent (0.5 RTT)
• HTTP response is received (0.5 RTT)

In total, that's 2 RTT, hence the /2.
The problem is if you're using a persistent HTTP connection because only the first request takes 2 RTT, then the next ones take only 1 RTT. This typically doesn't happen for XHR though.

[n-st]

A good idea in theory, but not when your server sends a Connection: keep-alive header:

I'd suggest making keep-alive mandatory for the server setup and then just discarding the first ping result (the one that establishes the connection).

[adolfintel]

Yes, that's probably a good idea.
I'll add that in the next version

[n-st]

You might also want to mention the limitations of the ping test more clearly: I came here after a hosting provider got called out for false advertising on a forum because the ping results from his speedtest page were half of what you would get from normal ping commands.

Disclaimer: I'm not that provider, just a curious bystander. ;)

[adolfintel]

I'm sure I had that in the old version of the documentation.
Anyways, expect an update in the next few hours.