database って色々あるけど何使えばいいの？

https://app.codecrafters.io/catalog

• BLAS とか使えば一緒?
• mojo も参戦

https://github.com/juhaku/utoipa/issues/598#issuecomment-1526374675

axum の 場合

pub fn api_doc() -> Json<utoipa::openapi::OpenApi> {
    Json(ApiDoc::openapi())
}

std::mpsc::Sender is !Sync (which means you need to wrap it with a Mutex or similar) where crossbeam::channel::Sender is Sync. Other than the perforance gains, seems like crossbeam is status quo.

we don’t want multiple runtimes in one app.

use std::thread;

#[tokio::main]
async fn main() {
    thread::spawn(move ||{
        async_function().await;
    });
}

async fn async_function() {
}

but there might be situations that we want to fun async functions inside our dedicated thread.

in that case you get the handle of the runtime and use that

use tokio::runtime::Handle;

let handle = Handle::current();

handle.spawn(async move{
    async_function().await;
});

Almost always use const. I guess when const it lives in the binary, on the otherhand when it’s a static it has a memory assigned and could be modified through unsafe operations.

https://stackoverflow.com/questions/52751597/what-is-the-difference-between-a-constant-and-a-static-variable-and-which-should