diff --git a/fhevm-engine/executor/src/dfg.rs b/fhevm-engine/executor/src/dfg.rs
index 31569cca..a10de529 100644
--- a/fhevm-engine/executor/src/dfg.rs
+++ b/fhevm-engine/executor/src/dfg.rs
@@ -132,7 +132,7 @@ impl<'a> DFGraph<'a> {
     }
 
     pub fn get_results(&mut self) -> Result<Vec<CompressedCiphertext>, SyncComputeError> {
-        let mut res = vec![];
+        let mut res = Vec::with_capacity(self.graph.node_count());
         for index in 0..self.graph.node_count() {
             let node = self.graph.node_weight_mut(NodeIndex::new(index)).unwrap();
             if let Some(imc) = &node.result {