* Unexpected observation:

When I compile a certain thread/task on HubrisOS with opt level "z" (rather than 3) it:
(1) with lto=false: increases the size of the supervisor thread from `1456` bytes to `9844` bytes (roughly `8000` byte increase)
(2) with lto=true: increases from `1456` to `1496` bytes (less than `50` byte increase)

What might be going on, I though "z" was supposed to reduce size?

```
[profile.release]
codegen-units = 1
debug = 2
lto = true
opt-level = "z"

[profile.release.package."*"]
opt-level = "z"
debug= 2
```