"PHP is slow, blah blah blah"

Well, turns out that it's just like any other language: you need to know how it works to improve its performances.

Amazing performance: https://dev.to/realflowcontrol/processing-one-billion-rows-in-php-3eg0

Processing One Billion Rows in PHP!

You may have heard of the "The One Billion Row Challenge" (1brc) and in case you don't, go checkout...

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@pierstoval Something that's supposed to be dead and is slow is called a zombie. 😁

"Language X is slow but Y isn't" are two languages where having no know-how still result in different performance. Y may show other problems over time, but the project, that was written with it, progressed too far to ditch it in favor of language Z.