I have been observing slow load times for webpages recently (both wired and wireless). This recent thread raised the potential that SQM on 19.x might be degraded vs 18.x. Since I am running 19.07.0-rc2 on a R7800, I wanted some a quantitative and reproducible way to get some numbers rather than relying on perception.
On my wired desktop, I cleared the local DNS cache
systemd-resolve --flush-caches) and ran the script with SQM disabled, and then with it enabled.
This table shows the ratio of average response times (without SQM/with SQM). Values >1 mean SQM was faster.
For the most part, they are within 2-fold. The two exceptions are freenom and neustar. In my case, I use quad9 so I am not concerned about these (actually never heard of them before finding that script).
The conclusion I came to is there is no appreciable difference in DNS response rates with or without SQM enabled.
I think I still need some test of the entire transaction (dns lookup, data download) to answer the original question. Before I go hacking together some shell script that goes out and times webpage loads, perhaps someone has an idea to test that is already made?