diff --git a/tokio/src/runtime/thread_pool/worker.rs b/tokio/src/runtime/thread_pool/worker.rs
index 7e4989701e5..5cd2eb7915d 100644
--- a/tokio/src/runtime/thread_pool/worker.rs
+++ b/tokio/src/runtime/thread_pool/worker.rs
@@ -194,9 +194,9 @@ pub(super) fn create(
     before_park: Option<Callback>,
     after_unpark: Option<Callback>,
 ) -> (Arc<Shared>, Launch) {
-    let mut cores = vec![];
-    let mut remotes = vec![];
-    let mut worker_metrics = vec![];
+    let mut cores = Vec::with_capacity(size);
+    let mut remotes = Vec::with_capacity(size);
+    let mut worker_metrics = Vec::with_capacity(size);
 
     // Create the local queues
     for _ in 0..size {