Auto merge of #76928 - lcnr:opaque-types-cache, r=tmandry
cache types during normalization
partially fixes #75992
reduces the following test from 14 to 3 seconds locally.
cc `@Mark-Simulacrum` would it make sense to add that test to `perf`?
```rust
#![recursion_limit="2048"]
#![type_length_limit="112457564"]
pub async fn h0(v: &String, x: &u64) { println!("{} {}", v, x) }
pub async fn h1(v: &String, x: &u64) { h0(v, x).await }
pub async fn h2(v: &String, x: &u64) { h1(v, x).await }
pub async fn h3(v: &String, x: &u64) { h2(v, x).await }
pub async fn h4(v: &String, x: &u64) { h3(v, x).await }
pub async fn h5(v: &String, x: &u64) { h4(v, x).await }
pub async fn h6(v: &String, x: &u64) { h5(v, x).await }
pub async fn h7(v: &String, x: &u64) { h6(v, x).await }
pub async fn h8(v: &String, x: &u64) { h7(v, x).await }
pub async fn h9(v: &String, x: &u64) { h8(v, x).await }
pub async fn h10(v: &String, x: &u64) { h9(v, x).await }
pub async fn h11(v: &String, x: &u64) { h10(v, x).await }
pub async fn h12(v: &String, x: &u64) { h11(v, x).await }
pub async fn h13(v: &String, x: &u64) { h12(v, x).await }
pub async fn h14(v: &String, x: &u64) { h13(v, x).await }
pub async fn h15(v: &String, x: &u64) { h14(v, x).await }
pub async fn h16(v: &String, x: &u64) { h15(v, x).await }
pub async fn h17(v: &String, x: &u64) { h16(v, x).await }
pub async fn h18(v: &String, x: &u64) { h17(v, x).await }
pub async fn h19(v: &String, x: &u64) { h18(v, x).await }
macro_rules! async_recursive {
(29, $inner:expr) => { async { async_recursive!(28, $inner) }.await };
(28, $inner:expr) => { async { async_recursive!(27, $inner) }.await };
(27, $inner:expr) => { async { async_recursive!(26, $inner) }.await };
(26, $inner:expr) => { async { async_recursive!(25, $inner) }.await };
(25, $inner:expr) => { async { async_recursive!(24, $inner) }.await };
(24, $inner:expr) => { async { async_recursive!(23, $inner) }.await };
(23, $inner:expr) => { async { async_recursive!(22, $inner) }.await };
(22, $inner:expr) => { async { async_recursive!(21, $inner) }.await };
(21, $inner:expr) => { async { async_recursive!(20, $inner) }.await };
(20, $inner:expr) => { async { async_recursive!(19, $inner) }.await };
(19, $inner:expr) => { async { async_recursive!(18, $inner) }.await };
(18, $inner:expr) => { async { async_recursive!(17, $inner) }.await };
(17, $inner:expr) => { async { async_recursive!(16, $inner) }.await };
(16, $inner:expr) => { async { async_recursive!(15, $inner) }.await };
(15, $inner:expr) => { async { async_recursive!(14, $inner) }.await };
(14, $inner:expr) => { async { async_recursive!(13, $inner) }.await };
(13, $inner:expr) => { async { async_recursive!(12, $inner) }.await };
(12, $inner:expr) => { async { async_recursive!(11, $inner) }.await };
(11, $inner:expr) => { async { async_recursive!(10, $inner) }.await };
(10, $inner:expr) => { async { async_recursive!(9, $inner) }.await };
(9, $inner:expr) => { async { async_recursive!(8, $inner) }.await };
(8, $inner:expr) => { async { async_recursive!(7, $inner) }.await };
(7, $inner:expr) => { async { async_recursive!(6, $inner) }.await };
(6, $inner:expr) => { async { async_recursive!(5, $inner) }.await };
(5, $inner:expr) => { async { async_recursive!(4, $inner) }.await };
(4, $inner:expr) => { async { async_recursive!(3, $inner) }.await };
(3, $inner:expr) => { async { async_recursive!(2, $inner) }.await };
(2, $inner:expr) => { async { async_recursive!(1, $inner) }.await };
(1, $inner:expr) => { async { async_recursive!(0, $inner) }.await };
(0, $inner:expr) => { async { h19(&String::from("owo"), &0).await; $inner }.await };
}
async fn f() {
async_recursive!(14, println!("hello"));
}
fn main() {
let _ = f();
}
```
r? `@eddyb` requires a perf run.
6d3acf5129