fat struct style guide?

[monkyyy]

On Tuesday, 24 February 2026 at 22:11:36 UTC, Julian Fondren 
wrote:
> On Tuesday, 24 February 2026 at 21:56:47 UTC, monkyyy wrote:
>> only with a pretty void* cast is accessing a tagged union 
>> field that happens to line up 0 indirection, everyone here is 
>> going to tell me to do the safe then and write an abstracted 
>> getter that gets the .offsetof `age`.
>
> Some other options: using a common struct member for the common 
> cases, and rotating the struct so that you have a 
> struct-of-arrays (SoA) instead of an array of structs. Whether 
> these are wins depends on what you're doing exactly. If the 
> variants have very different fields, SoA stops making sense 
> fast. But to add 10 all the ages you would have a function that 
> modifies an int[]

I dont wanta do soa without compiler help, it hard, Ive tried; 
its in theory 8x maybe 16x when the standard code is 10000x 
slower then what I write. 10x complexity doesnt seem worth it.