this post was submitted on 07 Jul 2025
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Yep very weird, should have been 255.
No, you can't have a group of zero, so the counter doesn't need to waste a position counting zero.
If you ever create a system where the number of users is "group.members - 1" everywhere in the code, I'd be very disappointed in you and deny that PR.
On another note; I doubt WhatsApp are so concerned with performance they are actually limiting the number of group members by the data type.
But it wouldn't be like that though would it. It would be public group.members() and the u8 would be private.
If all the millions of groups are saved on a central database then making the size a u8 isn't really that weird
I hadn't thought about it on their server side tbf. But the more i think about it maybe there are other compounding reasons to keep group sizes small, such as the exponential number of links in a growing network and such. But, that is all beyond my knowledge area.