• Mark Lagodych (6/7) Jul 22 2021 Do static variables consume *any* memory in instances, perhaps
• Adam D Ruppe (3/7) Jul 22 2021 right
• Mark Lagodych (2/9) Jul 22 2021 Thank you! Didn't see your reply.
• Mark Lagodych (17/19) Jul 22 2021 Figured it out.

Mark Lagodych <lgd.mrk gmail.com> writes:

[D documentation](https://dlang.org/spec/attribute.html#static) 
says:
 Static data has one instance per thread, not one per object.

Do static variables consume *any* memory in instances, perhaps 
just for pointers to the variables? Or does compiler 
automatically convert `someObject.someStaticMember` to 
`SomeClass.someStaticMember`?

Adam D Ruppe <destructionator gmail.com> writes:

On Thursday, 22 July 2021 at 15:50:59 UTC, Mark Lagodych wrote:
 Do static variables consume *any* memory in instances, perhaps 
 just for pointers to the variables?

nope

 Or does compiler automatically convert 
 `someObject.someStaticMember` to `SomeClass.someStaticMember`?

right

Mark Lagodych <lgd.mrk gmail.com> writes:

On Thursday, 22 July 2021 at 16:05:41 UTC, Adam D Ruppe wrote:
 On Thursday, 22 July 2021 at 15:50:59 UTC, Mark Lagodych wrote:
 Do static variables consume *any* memory in instances, perhaps 
 just for pointers to the variables?

 nope

 Or does compiler automatically convert 
 `someObject.someStaticMember` to `SomeClass.someStaticMember`?

 right

Thank you! Didn't see your reply.

Mark Lagodych <lgd.mrk gmail.com> writes:

On Thursday, 22 July 2021 at 15:50:59 UTC, Mark Lagodych wrote:
 Do static variables consume *any* memory in instances, perhaps 
 just for pointers to the variables?

Figured it out.

Let's try:
```d
import std.stdio;

class A {
     static int 
a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z;
}

void main() {
     writeln(__traits(classInstanceSize, A));
}
```

Prints: `16`
Without static: `120`
Difference: `104`, exactly `26 * int.sizeof`

So, the answer is **NO**, no memory is taken from instances.