You've probably heard of print debugging, but maybe not the lesser known member of the print family: print-optimization. Sometimes it's interesting to measure the time some part of your code uses, but you won't set up everything you need for profiling your entire program (or you don't have that option in the environment you're working in).
Doing this in Rust requires some boilerplate at the moment, especially if
you want to print out an easily readable output that you can navigate
directly to the relevant lines of code from. This crate aims to make this
easier to do:
Here's an example:
```rust use printperf::*; use std::time::Duration; fn add(a: i32, b: i32) -> i32 { std::thread::sleep(Duration::frommillis(100)); a + b }
fn main() { let addp = perf!("add fn"); let result = add(4, 4); addp.end(); // ^-- prints: 0.100140446 (add fn) @ [src/main.rs:9] assert_eq!(result, 8); } ```
The exact output printed by this macro should not be relied upon and is subject to future changes.
Panics if writing to io::stderr fails.