this post was submitted on 19 May 2025
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Measuring the latency of 574k servers around the world from my lemmy server (files.catbox.moe)
submitted 4 weeks ago by kernelle@0d.gs to c/map_enthusiasts@sopuli.xyz
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Located in London, I measured the RTT or round trip time to 574,691 random webservers and plotted the times on the globe.

Discovery was done with masscan, measurements using hping and plotting with an old Python script I've revived and enhanced.

This is part of the next writeup on my blog, with which I will be posting any of the code I've used.

Blog / How I made a blog using Lemmy

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[–] notfromhere@lemmy.ml 3 points 4 weeks ago (1 children)

LEO satellite comms coming online to route some of this traffic should be closer to c since will relay satellite to satellite to the last mile ground station to then reach the destination.

[–] unexposedhazard@discuss.tchncs.de 5 points 4 weeks ago (1 children)

It is faster per distance covered, but the distance that needs to be covered is significantly larger so it cancels out i think.

[–] notfromhere@lemmy.ml 4 points 4 weeks ago (1 children)

I haven’t digested this whole paper, but it seems like it would be faster than fiber all the way. https://people.eecs.berkeley.edu/~sylvia/cs268-2019/papers/starlink.pdf

[–] unexposedhazard@discuss.tchncs.de 5 points 4 weeks ago* (last edited 4 weeks ago)

Thanks for the source :)

Starlink’s LEO satellites will be in 1,110 to 1,325 km orbits. Although much lower than GEO, this is still too high to pro- vide lower latency than fiber over shorter distances. However, over longer distances the extra latency getting between Earth and the nearest satellite may be more than offset by routing around the world between the satellites at c.

So yeah makes sense. The inital distance to space completely tanks the short distance latency, but eventually gets compensated by the higher transmissions speed when trying to cover longer distances. I havent found it yet, but what i really wanna know is the distance value at which sat overtakes fiber. I dont think this paper covers that sadly.