add timing helper method to shared library

Author: Alextopher

aoc/src/lib.rs

@@ -2,12 +2,14 @@ pub mod algs;
 pub mod get_mut;
 pub mod iterstuff;
 pub mod stringstuff;
+mod time;
 pub mod tree;
 pub mod unionfind;
 
 pub use aoc_macro::input_str;
 pub use get_mut::GetMany;
 pub use iterstuff::IterJunk;
+pub use time::time;
 pub use tree::{Node, Tree};
 pub use unionfind::UnionFind;
 

aoc/src/time.rs

@@ -0,0 +1,9 @@
+pub fn time<F, T>(task: &str, f: F) -> T
+where
+    F: FnOnce() -> T,
+{
+    let start = std::time::Instant::now();
+    let result = f();
+    println!("{}: {:?}", task, start.elapsed());
+    result
+}