alamb commented on pull request #8303:
URL: https://github.com/apache/arrow/pull/8303#issuecomment-701303597
> Doesn't an Option of a reference leverages null pointer optimization (on
which None is represented by the null pointer, e.g. rust-lang/rust#9378)?
@jorgecarleitao I believe you are correct:
This program:
```
fn main() {
println!("The size of a &str is {}", std::mem::size_of::<&str>());
println!("The size of an Option<&str> is {}",
std::mem::size_of::<Option<&str>>());
}
```
Produces the following on my machine:
```
The size of a &str is 16
The size of an Option<&str> is 16
```
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