To be more precise, this is a review of more than 10 free and open source time series databases, wherein the author chooses 10 favourites, by some metrics.
Well, for one thing, this isn't even attempting an objective comparison. The article basically grabs whatever third party benchmark numbers are available and pretends all the metrics are comparable. In many cases, the external benchmarks are testing entirely different things, so it's meaningless to give those numbers in a "review" of all the options.
It's really just a "top ten list according to my arbitrary thoughts", which is fine. But it's not really a useful comparison at all.
I have no idea; it's not an area of my expertise. However, the author tests 16 and selects 10 by the methods shown. I'm glad for the reinforcement that these are likely reasonably decent ones by social proof via you!
