Comment by zgluck

3 years ago

I can't find any (official) documentation on how it measures the speed. Against which target?

Edit: Found https://www.macinstruct.com/tutorials/how-to-check-your-macs... which says:

"The networkquality tool uses Apple’s CDN (https://mensura.cdn-apple.com/api/v1/gm/config) as a target"

The contents of this file (for me):

  { "version": 1,
    "test_endpoint": "sesto4-edge-bx-021.aaplimg.com",
    "urls": {
        "small_https_download_url": "https://mensura.cdn-apple.com/api/v1/gm/small",
        "large_https_download_url": "https://mensura.cdn-apple.com/api/v1/gm/large",
        "https_upload_url": "https://mensura.cdn-apple.com/api/v1/gm/slurp",
        "small_download_url": "https://mensura.cdn-apple.com/api/v1/gm/small",
        "large_download_url": "https://mensura.cdn-apple.com/api/v1/gm/large",
        "upload_url": "https://mensura.cdn-apple.com/api/v1/gm/slurp"
     }
  }

2 comments

zgluck

Reply
varenc  3 years ago

It’s a new proposed standard that’s gaining support. People are building alternative party implementations for it: https://github.com/network-quality/goresponsiveness

Try running it with `-s` to see if you get speed tests that resemble what you expect. The idea is that maxing out both links at once is a better measure of network quality than sequence speed tests. Also it’s new RTT metric is key.

Etheryte  3 years ago

I find solace in the fact that even at large companies, there's still enough whimsy to name your upload endpoint slurp.