From cb84e3f02953f2df166ae69369d222dcbbd7d78d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Sat, 1 Oct 2016 15:44:53 +0300
Subject: cmd, core, internal, light, tests: avoid hashing the code in the VM

---
 core/vm/vm.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'core/vm/vm.go')

diff --git a/core/vm/vm.go b/core/vm/vm.go
index 9d7b55058..5d78b4a2a 100644
--- a/core/vm/vm.go
+++ b/core/vm/vm.go
@@ -71,10 +71,11 @@ func (evm *EVM) Run(contract *Contract, input []byte) (ret []byte, err error) {
 		return nil, nil
 	}
 
-	var (
-		codehash = crypto.Keccak256Hash(contract.Code) // codehash is used when doing jump dest caching
-		program  *Program
-	)
+	codehash := contract.CodeHash // codehash is used when doing jump dest caching
+	if codehash == (common.Hash{}) {
+		codehash = crypto.Keccak256Hash(contract.Code)
+	}
+	var program *Program
 	if evm.cfg.EnableJit {
 		// If the JIT is enabled check the status of the JIT program,
 		// if it doesn't exist compile a new program in a separate
-- 
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