From e8151ed27210ba36df05ec058d2fc512f9211756 Mon Sep 17 00:00:00 2001
From: Sergey Pepyakin <sergei@parity.io>
Date: Tue, 16 Jul 2019 18:13:46 +0300
Subject: [PATCH] Optimize pushing the stack

---
 src/runner.rs | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/runner.rs b/src/runner.rs
index bcc1853..4e05e74 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -1289,12 +1289,9 @@ impl FunctionContext {
         debug_assert!(!self.is_initialized);
 
         let num_locals = locals.iter().map(|l| l.count() as usize).sum();
-        let locals = vec![Default::default(); num_locals];
-
-        // TODO: Replace with extend.
-        for local in locals {
+        for _ in 0..num_locals {
             value_stack
-                .push(local)
+                .push(Default::default())
                 .map_err(|_| TrapKind::StackOverflow)?;
         }