Single-threaded actix-web...?

help
1

Hi.

So, I am trying to build a web application in Rust. And each time I create a new actix-web project, I have this kind of code:

#[tokio::main]
async fn main() {
  let _ = HttpServer::new(|| {
    App::new()
  })
    .bind("127.0.0.1:5024")
    .unwrap()
    .run()
    .await;
}

However, this simple web application spawns so much thread (even if I try to set the worker count to 1)

How do I make the actix-web to run on the currently running thread instead of spawning new threads?

2

I'm afraid you can't. HttpServer will always start at least one worker thread per address you bind your server to. You can limit your example to a worker thread and the main thread, but not to just the main thread using HttpServer::workers:

#[tokio::main]
async fn main() {
  let _ = HttpServer::new(|| {
    App::new()
  })
    .bind("127.0.0.1:5024")
    .workers(1)
    .unwrap()
    .run()
    .await;
}
1 Like
3

Hi @jofas

Thank you for answer. And yeah, I've been exploring actix-web and it looks like there's no way to accomplish what I want.

If you have any alternatives to actix-web (for this specific purpose), I'd be happy to hear one.

4

Axum is quite similar to Actix-web. Warp is also pretty popular. Both are build on top of hyper and you can run them in a single-threaded tokio runtime.

3 Likes
5

Thank you, I'll look into each of them

1 Like
6

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