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https://github.com/rbatis/fast_pool

a fast async pool based on channel
https://github.com/rbatis/fast_pool

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a fast async pool based on channel

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# fast_pool

[![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
[![GitHub release](https://img.shields.io/github/v/release/rbatis/fast_pool)](https://github.com/rbatis/fast_pool/releases)

a fast async pool based on channel
* support `get()`,`get_timeout()`,`state()` methods
* support atomic max_open(Resize freely)
* based on [flume](https://crates.io/crates/flume)

### way fast_pool?

* fast get() method performance
```log
//windows:
//---- bench_pool stdout ----
//use Time: 4.0313ms ,each:40 ns/op
//use QPS: 24749412 QPS/s
//macos:
//---- bench_pool stdout ----
// use Time: 6.373708ms ,each:63 ns/op
// use QPS: 15683710 QPS/s
```

### how to use this?

* add toml
```toml
fast_pool="0.1"
async-trait = "0.1"
tokio = {version = "1",features = ["time","rt-multi-thread","macros"]}
```
* impl trait
```rust
use std::ops::{DerefMut};
use std::time::Duration;
use async_trait::async_trait;
use fast_pool::{Manager, Pool};

#[derive(Debug)]
pub struct TestManager {}

impl Manager for TestManager {
type Connection = String;
type Error = String;

async fn connect(&self) -> Result {
Ok("conn".to_string())
}

async fn check(&self, conn: &mut Self::Connection) -> Result<(), Self::Error> {
//check should use conn.ping()
if conn == "error" {
return Err(Self::Error::from("error".to_string()));
}
Ok(())
}
}

#[tokio::main]
async fn main() {
let p = Pool::new(TestManager {});
println!("status = {}",p.state());
p.set_max_open(10);
println!("status = {}",p.state());

let mut conn = p.get().await.unwrap();
println!("conn = {}",conn.deref_mut());
let mut conn = p.get_timeout(Some(Duration::from_secs(1))).await.unwrap();
println!("conn = {}",conn.deref_mut());
}
```