There are a few things that can stop the cache from working.
dylan wenzlau

Thanks for your quick reply!
1,2&3: yes.
At first, I didn’t have OPCache enabled, but it didn’t seem to make any difference. I’m running the tests on PHP-cli.
If I’m not mistaken, APCu is in-memory, so there’s no I/O taking place.
I appreciate your effort! Would be great, if this could work for me as well :)

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