how do i understand the value of connect type？

[hq229075284]

You can see from the picture above.In 4G mode,what's mean that 171s and +166s?

[zouhir]

Hey! Sorry for my delayed response.

Ultimately, your assets should load < 5s on your target audience connection type.

Your asset's in this photo will load under this budget for 20mbps connection only and you have 1s room.

I apologize as in this beta, things are not super clear but I'll definitely work on the UX and improve this section.

[hq229075284]

In other word,except for 20mbps,everything else is fake data？

[zouhir]

No, it's connection speed data from webpagetest.org

Your bundle is huge :) or it's dev bundle, looking at Global Average

Connection Speed is: 0.4mpbs === 400kbps
RTT = 160ms

and your assets will take 182s to download on that speed (~3min)

[TimoStaudinger]

@zouhir I found the numbers on the dashboard a bit confusing as well, so I dug into it a little. It seems like the way it is implemented right now messes up some units along the way:

let time = assetsSize / 1024 / (i.internet_speed * 1024 / 8) + i.rtt;

, where assetsSize is the size of the bundle in kB if I'm not wrong, converted to MB via assetsSize / 1024. i.internet_speed is the bandwidth in mbps, converted to kbps via i.internet_speed * 1024, and to kBps via ... / 8. That means, we effectively compare MB to kBps here.

Also, I believe the RTT, i.rtt, is listed in milliseconds, not seconds, so we are adding milliseconds to seconds without conversion.

I took the example from the screenshot in the read-me, with a bundle size of ~920kB, and did some calculations in Excel:

Those times seem much more reasonable to me than what we are seeing in the screenshot, e.g. ~180s download time of ~920kB via 4G.

Considering those points, I believe the correct formula should be:

let time = assetsSize / (i.internet_speed * 1024 / 8) + (i.rtt / 1000);

Let me know if I missed something. If you agree with my logic, I'll submit a PR later.

[zouhir]

I swear I knew something didn't make sense in my quick and dirty calculations 😂 thank you for looking at this bit, your calculations are the correct ones, I welcome a PR!!!!

[hq229075284]

I'm sorry to see the reply so late.I'm just as confused as @timosta is.Pack a small file, but display it on the dashborad for such a long time.

The explanation given by @timosta is detailed and taught.

thank you @zouhir @timosta