diff --git a/bench/src/main.rs b/bench/src/main.rs
index a6b106a..7a47e90 100644
--- a/bench/src/main.rs
+++ b/bench/src/main.rs
@@ -35,7 +35,8 @@ fn main() {
         let optimiser = Optimiser::new(&config, initial_set, &items).unwrap();
 
         let final_state = optimiser.optimise().unwrap();
-        println!("Set Energy: {}", -final_state.energy(&config, &items));
+        let sets = final_state.sets(&items);
+        println!("Set Energy: {}", -final_state.energy(&config, &sets));
     }
 }
 
diff --git a/dofus_set/src/dofus_set.rs b/dofus_set/src/dofus_set.rs
index 5fd3ee8..45c117b 100644
--- a/dofus_set/src/dofus_set.rs
+++ b/dofus_set/src/dofus_set.rs
@@ -120,11 +120,13 @@ impl State {
 
     fn valid(&self, config: &config::Config, items: &Items, leniency: i32) -> bool {
         let mut total_set_bonuses = 0;
-        for set_bonus in self.sets(items) {
+        let sets = self.sets(items);
+
+        for set_bonus in &sets {
             total_set_bonuses += set_bonus.number_of_items - 1;
         }
 
-        let stats = self.stats(config, items);
+        let stats = self.stats(config, &sets);
 
         for item in self.items(items) {
             if item.level > config.max_level {
@@ -165,8 +167,12 @@ impl State {
         true
     }
 
-    pub fn energy(&self, config: &config::Config, items: &Items) -> f64 {
-        let stats = self.stats(config, items);
+    pub fn energy(
+        &self,
+        config: &config::Config,
+        sets: &heapless::Vec<SetBonus<'_>, MAX_SETS>,
+    ) -> f64 {
+        let stats = self.stats(config, sets);
         // need to take the negative due to being a minimiser
         let energy_non_element = stats
             .iter()
@@ -232,10 +238,14 @@ impl State {
         self.cached_totals += &item.stats;
     }
 
-    pub fn stats(&self, config: &config::Config, items: &Items) -> Characteristic {
+    pub fn stats(
+        &self,
+        config: &config::Config,
+        sets: &heapless::Vec<SetBonus<'_>, MAX_SETS>,
+    ) -> Characteristic {
         let mut stat = self.cached_totals.clone();
 
-        for set_bonus in self.sets(items) {
+        for set_bonus in sets {
             stat += set_bonus.bonus;
         }
 
@@ -397,7 +407,8 @@ impl<'a> anneal::Anneal<State> for Optimiser<'a> {
     }
 
     fn energy(&self, state: &State) -> f64 {
-        state.energy(self.config, self.items)
+        let sets = state.sets(self.items);
+        state.energy(self.config, &sets)
     }
 
     fn temperature(&self, iteration: f64, _energy: f64) -> f64 {
diff --git a/dofus_set/src/main.rs b/dofus_set/src/main.rs
index cd00a0c..3922487 100644
--- a/dofus_set/src/main.rs
+++ b/dofus_set/src/main.rs
@@ -35,7 +35,8 @@ fn main() {
 
     let final_state = optimiser.optimise().unwrap();
     print_state(&final_state, &config, &items);
-    println!("Set Energy: {}", -final_state.energy(&config, &items));
+    let sets = final_state.sets(&items);
+    println!("Set Energy: {}", -final_state.energy(&config, &sets));
 }
 
 pub fn print_state(state: &State, config: &config::Config, items: &Items) {
@@ -53,7 +54,8 @@ pub fn print_state(state: &State, config: &config::Config, items: &Items) {
     }
     println!("Stats");
     println!("-----------------------------");
-    print_stats(&state.stats(config, items));
+    let sets = state.sets(items);
+    print_stats(&state.stats(config, &sets));
     println!("\nSet bonuses");
     println!("-----------------------------");
     for set_bonus in state.sets(items) {
diff --git a/server/src/main.rs b/server/src/main.rs
index cae42e8..7c1bd75 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -111,8 +111,9 @@ fn create_optimised_set(
 
     let final_state = optimiser.optimise()?;
 
-    let set_bonuses = final_state
-        .sets(items)
+    let sets = final_state.sets(items);
+
+    let set_bonuses = sets
         .iter()
         .map(|set| OptimiseResponseSetBonus {
             name: set.name.to_owned(),
@@ -122,8 +123,8 @@ fn create_optimised_set(
         .collect();
 
     Ok(OptimiseResponse {
-        energy: -final_state.energy(&dofus_set_config, items),
-        overall_characteristics: final_state.stats(&dofus_set_config, items).clone(),
+        energy: -final_state.energy(&dofus_set_config, &sets),
+        overall_characteristics: final_state.stats(&dofus_set_config, &sets).clone(),
         items: final_state
             .set()
             .map(|idx| {