tawasuyu/taffy

* Fix benchmark compilation + add super deep benchmarks

* cargo fmt

diff --git a/benches/big_tree.rs b/benches/big_tree.rs
index d965885ac..12154205a 100644
--- a/benches/big_tree.rs
+++ b/benches/big_tree.rs
@@ -203,6 +203,23 @@ fn taffy_benchmarks(c: &mut Criterion) {
 
         b.iter(|| taffy.compute_layout(root, Size::MAX_CONTENT).unwrap())
     });
+
+    drop(group);
+
+    let mut group = c.benchmark_group("super deep trees");
+    group.sample_size(10);
+
+    group.bench_function("100 nodes (100-level hierarchy)", |b| {
+        let mut taffy = Taffy::new();
+        let root = build_yoga_deep_hierarchy(&mut taffy, 100, 1);
+        b.iter(|| taffy.compute_layout(root, Size::MAX_CONTENT).unwrap())
+    });
+
+    group.bench_function("1_000 nodes (1000-level hierarchy)", |b| {
+        let mut taffy = Taffy::new();
+        let root = build_yoga_deep_hierarchy(&mut taffy, 1_000, 1);
+        b.iter(|| taffy.compute_layout(root, Size::MAX_CONTENT).unwrap())
+    });
 }
 
 criterion_group!(benches, taffy_benchmarks);
diff --git a/benches/complex.rs b/benches/complex.rs
index 4ba4945c3..ad7493b14 100644
--- a/benches/complex.rs
+++ b/benches/complex.rs
@@ -1,4 +1,5 @@
 use criterion::{criterion_group, criterion_main, Criterion};
+use taffy::tree::LayoutTree;
 
 fn build_deep_hierarchy(taffy: &mut taffy::node::Taffy) -> taffy::node::Node {
     let node111 = taffy