diff --git a/library/alloc/src/macros.rs b/library/alloc/src/macros.rs
index 2f744618d6936..e641a0e07730b 100644
--- a/library/alloc/src/macros.rs
+++ b/library/alloc/src/macros.rs
@@ -102,6 +102,10 @@ macro_rules! vec {
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 macro_rules! format {
+    // A faster path for simple format! calls.
+    ("{}", $arg:ident) => {{
+        $crate::fmt::Display::to_string(&$arg)
+    }};
     ($($arg:tt)*) => {{
         let res = $crate::fmt::format($crate::__export::format_args!($($arg)*));
         res