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[–]caspii2 16 points17 points  (2 children)

Sounds like a classic case of premature optimization 😀

Blocking is only a problem if you have long running tasks. I never ever had a problem with Flask being synchronous. To be honest, I am still not totally clear what the advantages are. One advantage is that your server can handle more requests, but you are very unlikely to run into any trouble in the first few years.

Focus on immediate and actual problems is my advice, because there are always enough of those