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Site is down, any WordPress and php based stack will crash after 30-50 simultaneous requests ...

I am amazed that this doesn't seems to bother anyone ... And adding a cache layer is not a real solution ...

And in other parts of the internet there is few stacks delivering 5k to 150k rps per core without cache ...

But still everyone use WordPress ...

This is flat out false, WP is able to handle much more than this. I've scaled WordPress personally to 10M+ users per day

Because the way PHP work (1 process per request), it can't handle a lot of simultaneous requests and also anyone can crash ANY wordpress website with a single WRK command ... If you have all the content cached by your CDN it might be ok, but if you have a dynamic website with API/DB, not just static content ... wordpress is slow as hell from my experience

I've been using WordPress for 4 years with good scaling and no downtime. It's only "slow as hell" if you don't actually know WordPress (which most WordPress users don't). ;)

I relied on WordPress for several years (converted sites over from Rails):

https://battlepenguin.com/tech/a-history-of-personal-and-pro...

Quote often I'd get issues with the database failing due to load. I'm very glad I moved everything to a static content generator.

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