this post was submitted on 02 Jul 2023
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Docker most certainly does not use as much memory on Linux. Maybe on Windows, but not on Linux. It's not an issue with the amount of RAM. I had the same amount of memory on my previous Linux machine and it never even started swapping, whereas the new Macs start swapping soon as my usual dev environment with all the containers and the software and whathaveyous is up. Fortunately the system handles it pretty well, so it's not very noticeable.
I mean one of the main selling points of Docker is that it's not supposed to use a lot of memory to begin with because it's not a full-on VM. Otherwise I'd never been able to run it on all my puny first gen Raspberry Pis and tiny LXCs. But of course this applies to Linux mostly, because it's designed to share the Linux kernel. Hence the need to expend extra memory and CPU for compatibility on Windows and Macos.
Do agree on the bad hardware decision bit though. Ours are 16GB M2 Pros too. The boss, who's not the most tech-savvy person on the planet, chose those because that's what he uses. One day we found out that we were getting new laptops and that they would be M2 Pros, and that was it. If I was in charge of the purchase, I would deck everyone out with high-end x64 laptops that have a usable number of IO ports. Would have been significantly cheaper too. Everyone is just alt-tabbing between their IDEs and terminals anyway, so they'd hardly miss the "macos experience".