static files performance is weird. Does I missing something?

[wvq]

I wrote a simple code to serve static files, but its performance is too slow. Did I miss any configuration or code ?

CPU: i5-10400

use poem::{endpoint::StaticFilesEndpoint, handler, listener::TcpListener, web::Path, Route, Server};

#[handler]
fn hello(Path(name): Path<String>) -> String {
    format!("hello: {}", name)
}

#[tokio::main]
async fn main() -> Result<(), std::io::Error> {
    let endpoint = StaticFilesEndpoint::new("./static").show_files_listing();
    let app = Route::new().nest("/static", endpoint);

    Server::new(TcpListener::bind("0.0.0.0:8889"))
        .run(app)
        .await
}

testing read a ~5Mb picture, The req/sec is 66.26 , cpu usage is about ~700%

wrk -t8 -c500 -d30s http://192.168.31.28:8889/static/image/0a2cf6866a19cb2546ca8827e59997aa.png
Running 30s test @ http://192.168.31.28:8889/static/image/0a2cf6866a19cb2546ca8827e59997aa.png
  8 threads and 500 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     0.00us    0.00us   0.00us     nan%
    Req/Sec    18.41     15.58    90.00     75.46%
  1988 requests in 30.00s, 8.91GB read
  Socket errors: connect 251, read 113, write 0, timeout 1988
Requests/sec:     66.26
Transfer/sec:    304.00MB

Test another web framework ntex

use ntex::web;
use ntex_files as fs;

#[rustfmt::skip]
#[ntex::main]
async fn main() -> std::io::Result<()> {

    web::HttpServer::new(|| {

        web::App::new()
            .service(fs::Files::new("/static", "./static").show_files_listing())
    })
    .bind("0.0.0.0:8889")?
    .run()
    .await
}

The req/sec is 645.02 , cpu usage is about ~850%

wrk -t8 -c500 -d30s http://192.168.31.28:8889/static/image/0a2cf6866a19cb2546ca8827e59997aa.png
Running 30s test @ http://192.168.31.28:8889/static/image/0a2cf6866a19cb2546ca8827e59997aa.png
  8 threads and 500 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   375.71ms   69.00ms   1.08s    66.19%
    Req/Sec    81.43     39.01   333.00     70.89%
  19391 requests in 30.06s, 80.84GB read
  Socket errors: connect 251, read 104, write 0, timeout 0
Requests/sec:    645.02
Transfer/sec:      2.69GB