diff --git a/src/parser/utils.rs b/src/parser/utils.rs
index 442a7d3..451614a 100644
--- a/src/parser/utils.rs
+++ b/src/parser/utils.rs
@@ -18,6 +18,7 @@ impl<O, E: Error<Token>, P: Parser<Token, O, Error = E>> TokenParser<O, E> for P
 pub trait OrDefaultParser<I: Clone, O: Default, E: Error<I>>:
     Parser<I, O, Error = E> + Sized
 {
+    #[allow(clippy::type_complexity)]
     fn or_default(self) -> Map<OrNot<Self>, fn(Option<O>) -> O, Option<O>> {
         self.or_not().map(Option::unwrap_or_default)
     }
diff --git a/src/scheduling/astar.rs b/src/scheduling/astar.rs
index 5dbfdaf..2e7656a 100644
--- a/src/scheduling/astar.rs
+++ b/src/scheduling/astar.rs
@@ -131,21 +131,10 @@ pub struct Explored {
 type ExploredMap = HashMap<u64, Explored, BuildHasherDefault<NoopHasher>>;
 type ScheduleQueue = BinaryHeap<ScheduleNode>;
 
-struct FastHasher(ahash::AHasher);
-
-impl FastHasher {
-    fn new() -> Self {
-        Self(ahash::AHasher::default())
-    }
-
-    fn hash_one_off<T: Hash>(&mut self, value: &T) -> u64 {
-        let buf = &mut self.0 as *mut ahash::AHasher as *mut u64;
-        unsafe { *buf = 0 };
-
-        value.hash(&mut self.0);
-        
-        self.0.finish()
-    }
+fn hash_one_off<T: Hash>(value: &T) -> u64 {
+    let mut hashooor = ahash::AHasher::default();
+    value.hash(&mut hashooor);
+    hashooor.finish()
 }
 
 #[derive(Clone, Debug, Default)]
@@ -191,12 +180,10 @@ pub trait AStarScheduler: Sized + Sync + Send {
             at_end: start.all_done(),
         });
 
-        let mut hasher = FastHasher::new();
-
         // 1. Pop top of priority queue (node closest to end according to actual cost + estimated
         //    remaining distance).
         while let Some(mut node) = queue.pop() {
-            let came_from = hasher.hash_one_off(&node.state);
+            let came_from = hash_one_off(&node.state);
             // 2a. If the shortest node is the end we know we found our solution, accumulate the
             // steps and return.
             if node.at_end {
@@ -235,13 +222,13 @@ pub trait AStarScheduler: Sized + Sync + Send {
                 }
                 let new_cost = node.cost + steps.iter().map(|step| step.cost()).sum::<u32>();
                 tracker.total_explored += 1;
-                let new_state_hash = hasher.hash_one_off(&new_state);
+                let new_state_hash = hash_one_off(&new_state);
 
-                let new_cost_better = match explored.get(&new_state_hash) {
+                match explored.get(&new_state_hash) {
                     Some(e) => new_cost < e.cost,
                     None => true,
-                };
-                if new_cost_better {
+                }
+                .then(|| {
                     let out = explored.insert(
                         new_state_hash,
                         Explored {
@@ -252,14 +239,13 @@ pub trait AStarScheduler: Sized + Sync + Send {
                     );
                     tracker.total_collisions += if out.is_some() { 1 } else { 0 };
                     let score = new_cost + self.estimate_remaining_cost(info, &new_state, new_cost);
-                    return Some(ScheduleNode {
+                    ScheduleNode {
                         state: new_state,
                         cost: new_cost,
                         score,
                         at_end,
-                    });
-                }
-                None
+                    }
+                })
             }));
         }
 
diff --git a/src/transformer/ir_gen.rs b/src/transformer/ir_gen.rs
index 6ba2d5d..3a95198 100644
--- a/src/transformer/ir_gen.rs
+++ b/src/transformer/ir_gen.rs
@@ -126,18 +126,18 @@ impl SemanticContext {
 
     /// Returns the IDs of the nodes that the newly inserted node is now dependent on (non-operand
     /// semantic dependency).
-    pub fn record_write(&mut self, dependency: &String, id: CompNodeId) {
+    pub fn record_write(&mut self, dependency: &str, id: CompNodeId) {
         let mut pre_deps = self
             .last_reads
-            .insert(dependency.clone(), Vec::new())
+            .insert(dependency.to_string(), Vec::new())
             .unwrap_or_default();
-        pre_deps.extend(self.last_write.insert(dependency.clone(), id));
+        pre_deps.extend(self.last_write.insert(dependency.to_string(), id));
 
         self.nodes_sources[id].0.post.extend(pre_deps);
     }
 }
 
-fn unspan<T: Clone + Debug>(spanned: &Vec<Spanned<T>>) -> Vec<T> {
+fn unspan<T: Clone + Debug>(spanned: &[Spanned<T>]) -> Vec<T> {
     spanned.iter().map(Spanned::unwrap_ref).cloned().collect()
 }
 
@@ -235,7 +235,7 @@ fn set_blocked_count(input_ids: &[CompNodeId], output_ids: &[CompNodeId], nodes:
     let total = nodes.len();
 
     let mut blocked_by = vec![0u32; total];
-    let mut stack_count = vec![0u32; total];
+    let mut stack_counts = vec![0u32; total];
 
     for node in nodes.iter() {
         for post_id in node.post.iter() {
@@ -244,23 +244,22 @@ fn set_blocked_count(input_ids: &[CompNodeId], output_ids: &[CompNodeId], nodes:
         for dep_id in node.operands.iter() {
             blocked_by[*dep_id] += 1;
             // Blocked once as an argument.
-            stack_count[*dep_id] += 1;
+            stack_counts[*dep_id] += 1;
         }
     }
 
     for output_id in output_ids.iter() {
-        stack_count[*output_id] += 1;
+        stack_counts[*output_id] += 1;
     }
 
     for id in 0..total {
-        let required_dedups = stack_count[id].max(1) - 1;
+        let required_dedups = stack_counts[id].max(1) - 1;
         *nodes[id].blocked_by.as_mut().unwrap() += required_dedups + blocked_by[id];
     }
 
-    for id in 0..total {
-        if nodes[id].blocked_by.unwrap() == 0 && input_ids.contains(&id) && output_ids.contains(&id)
-        {
-            nodes[id].blocked_by = None;
+    for (id, node) in nodes.iter_mut().enumerate() {
+        if node.blocked_by.unwrap() == 0 && input_ids.contains(&id) && output_ids.contains(&id) {
+            node.blocked_by = None;
         }
     }
 }