why where these changed no one knows but past me

2023/day-21/Cargo.toml

@@ -12,6 +12,10 @@ nom = { workspace = true }
 itertools = {workspace = true }
 nom_locate.workspace = true
 glam.workspace = true
+dhat = { workspace = true }
 
 [dev-dependencies]
 rstest.workspace = true
+
+[features]
+dhat-heap = []

2023/day-21/src/main.rs

@@ -3,7 +3,14 @@
 use day_21::part1;
 use day_21::part2;
 
+#[cfg(feature = "dhat-heap")]
+#[global_allocator]
+static ALLOC: dhat::Alloc = dhat::Alloc;
+
 fn main() {
+    #[cfg(feature = "dhat-heap")]
+    let _profiler = dhat::Profiler::new_heap();
+
     let input = include_str!("./input.txt");
     let part1_result = part1(input, 64);
     println!("part 1: {part1_result}");