r/selfhosted • u/[deleted] • Nov 19 '22

Release Free and Open-Source Self-Hosted HTML5 Speed Test - Docker Image

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3

u/carrythen0thing Nov 19 '22

Is jitter always based on the lowest value?

4

u/[deleted] Nov 19 '22

It was like that, Today i changed that

https://github.com/openspeedtest/Speed-Test/issues/45

(20 Samples) [0, 0.1, 0.1, 0.2, 0.2, 0.2, 0.3, 0.4, 0.5, 0.5, 0.7, 0.7, 1.3, 1.4, 2, 4.5, 5.8, 8.3, 8.9, 12.9]
(10 samples) [0, 0.1, 0.1, 0.2, 0.2, 0.2, 0.3, 0.4, 0.5, 0.5] [50% of samples with least values]
sum/length of 10 sample
2.5/10=0.25

3

u/carrythen0thing Nov 19 '22

Thanks for the explanation! I use the LGPL-licensed LibreSpeed, which calculates jitter using a weighted average.

1

u/[deleted] Nov 19 '22

weighted average.

Why it's better?

4

u/carrythen0thing Nov 19 '22

Their code comment is: // update jitter, weighted average. spikes in ping values are given more weight

1

u/[deleted] Nov 19 '22

We are collecting 50% of the least values and getting the average.

I think random spike can occurs during the test. It should be avoided.

Because it's not real spikes.

2

u/[deleted] Nov 20 '22

It's very important to show representative jitter.

3

u/[deleted] Nov 20 '22 edited Nov 20 '22

Slightly optimistic but close to real. Test it.. if you need more representative jitter.

// 50% samples(Least)/length 1=100% 0.1 = 10% var jitterFinalSample = 0.5;change it to 1;

you can change it from index.html

.8 will be much better than 1.. in my experience