From 172b7894bebc42b2fe5dd13b0d9107a0605d2053 Mon Sep 17 00:00:00 2001
From: Brecht <Brechtp.Devos@gmail.com>
Date: Sun, 22 Apr 2018 17:58:25 +0200
Subject: [PATCH] Optimized bytesToBytes32()

---
 contracts/lib/BytesUtil.sol | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/contracts/lib/BytesUtil.sol b/contracts/lib/BytesUtil.sol
index cf474fba..5c3ec22f 100644
--- a/contracts/lib/BytesUtil.sol
+++ b/contracts/lib/BytesUtil.sol
@@ -30,8 +30,11 @@ library BytesUtil {
         pure
         returns (bytes32 out)
     {
-        for (uint i = 0; i < 32; i++) {
-            out |= bytes32(b[offset + i] & 0xFF) >> (i * 8);
+        require(b.length >= offset + 32);
+        bytes32 temp;
+        assembly {
+            temp := mload(add(add(b, 0x20), offset))
         }
+        return temp;
     }
-}
\ No newline at end of file
+}