How does the max_cost works?

[LinkTed]

Hi,
I have a question about the max_cost argument in the AsyncCache. When I set it to 2 and insert 2 item each have 1 cost, then one of the item is missing. Maybe I misinterpret something here. Code:

use stretto::AsyncCache;

#[tokio::main]
async fn main() {
    let c = AsyncCache::new(20, 2, tokio::spawn).unwrap();
    c.insert(1, 2, 1).await;
    c.insert(2, 3, 1).await;

    c.wait().await.unwrap();

    c.get(&1).unwrap(); // Get a panic
}

[Al Liu]

There is an internal_cost that will auto-add for each item if you do not set ignore_internal_cost to true when building the cache. See https://github.com/al8n/stretto#ignore_internal_cost.