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The benchmark seems a bit weird. Fetch 100 results from a table with no filtering,sorting,or anything? That feels like the IO is going to be really small anyways.

they compare threads and coroutines for limbo. threads have much worse p90 latencies since they context switch.... im not sure they can draw any conclusions except that coroutines are faster (of course)

So, it's almost useless.

https://www.kryogenix.org/code/browser/why-availability/

So this isn't faster for people running a monolith on one machine. This is only gives faster tail latency in congested multitenant scenarios. So only a narrow gain in a narrow scenario. Cool and all, all progress is good progress, but also not relevant for me or a lot of people.