Small optimization

openethereum · Oct 5, 2017 · 5876297 · 5876297
1 parent 6a1eea1
commit 5876297
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ethcore/src/executive.rs b/ethcore/src/executive.rs
@@ -416,7 +416,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 
 			let cost = builtin.cost(data);
 			if cost <= params.gas {
-				let mut builtin_out_buffer = Vec::new();
+				let mut builtin_out_buffer = Vec::with_capacity(output.len());
 				let result = {
 					let mut builtin_output = BytesRef::Flexible(&mut builtin_out_buffer);
 					builtin.execute(data, &mut builtin_output)