From 846d091bd25a9b3d0f6ed9c190d42027c682a045 Mon Sep 17 00:00:00 2001
From: Jeffrey Wilcke <jeffrey@ethereum.org>
Date: Thu, 25 May 2017 11:34:07 +0200
Subject: [PATCH] core/vm: allocate stack to 1024

Pre allocate the stack to 1024 optimising stack pushing, reducing calls
to runtime.makeslice and runtime.mallocgc
---
 core/vm/stack.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/vm/stack.go b/core/vm/stack.go
index f4777c5b3f..9c10d50ad1 100644
--- a/core/vm/stack.go
+++ b/core/vm/stack.go
@@ -29,7 +29,7 @@ type Stack struct {
 }
 
 func newstack() *Stack {
-	return &Stack{}
+	return &Stack{data: make([]*big.Int, 0, 1024)}
 }
 
 func (st *Stack) Data() []*big.Int {