Yes, it does look like none of the frameworks are using persistent connections, which would explain the horrible performance. To be fair though, it is still a valid measurement if the frameworks don't enable persistent connections by default.
> it is still a valid measurement if the frameworks don't enable persistent connections by default
I don't agree. Frameworks often prefer the "safe" option over "performance" by default. If you activate persistent connections by raw coding it [1] then you should also set an absolutely obvious database configuration flag like [2] in a framework.
It looks like it's off by default in Redbean at least. No idea if this makes a big difference, I haven't had time to try it out.