Actix processes blocking request handlers blockingly if I send them from different tabs in the same browser, but seems doesn't block across two different browsers.
What I do is send get requests from Chrome to block_me from adjacent tabs versus one request from Chrome and one from Firefox.

Is this because a new session means a new worker is spawned? If so will it start blocking if I exceed available_parallelism? Thanks.

use actix_web::{web, App, HttpResponse, HttpServer, Responder};

async fn blocking_handler() -> impl Responder {
    println!("blocking request received");
    std::thread::sleep(std::time::Duration::from_secs(10));
    "Blocking handler finally returns"
}

async fn non_blocking_handler() -> impl Responder {
    println!("NON blocking request received");
    tokio::time::sleep(std::time::Duration::from_secs(10)).await;
    "NON-Blocking handler finally returns"
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(||
        App::new()
            .route("/", web::get().to(HttpResponse::Ok))
            .route("/block_me", web::get().to(blocking_handler))
            .route("/non_block_me", web::get().to(non_blocking_handler))
    )
    .bind(("127.0.0.1", 9090))?
    .run()
    .await
}

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