tracing-calltree 0.1.2

Always-on hierarchical profiling for Rust tracing spans with rolling latency statistics.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

use std::time::Duration;
use tracing_calltree::CallTree;
use tracing_subscriber::prelude::*;

#[tracing::instrument(skip_all)]
async fn request() {
    load_context().await;
}

#[tracing::instrument(skip_all)]
async fn load_context() {
    query_database().await;
}

#[tracing::instrument(skip_all)]
async fn query_database() {
    tokio::time::sleep(Duration::from_millis(10)).await;
}

#[tokio::main(flavor = "current_thread")]
async fn main() {
    let calltree = CallTree::new();

    tracing_subscriber::registry().with(calltree.layer()).init();

    for _ in 0..5 {
        request().await;
    }

    println!("{}", calltree.snapshot().display());
}