Avoid Extra Allocation (paritytech#764)

boolnetwork · Jul 7, 2022 · d80c5fe · d80c5fe
1 parent 175e42f
commit d80c5fe
Showing 1 changed file with 10 additions and 5 deletions.
diff --git a/template/runtime/src/precompiles.rs b/template/runtime/src/precompiles.rs
@@ -15,11 +15,16 @@ where
 	pub fn new() -> Self {
 		Self(Default::default())
 	}
-	pub fn used_addresses() -> sp_std::vec::Vec<H160> {
-		sp_std::vec![1, 2, 3, 4, 5, 1024, 1025]
-			.into_iter()
-			.map(hash)
-			.collect()
+	pub fn used_addresses() -> [H160; 7] {
+		[
+			hash(1),
+			hash(2),
+			hash(3),
+			hash(4),
+			hash(5),
+			hash(1024),
+			hash(1025),
+		]
 	}
 }
 impl<R> PrecompileSet for FrontierPrecompiles<R>