From a45f49517b7fb4ed7981becb58898ea175273e80 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Tue, 23 Nov 2021 15:59:59 +0100
Subject: [PATCH] Avoid bounds checks in VectorMismatch

---
 src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs b/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
index 471c083cd..d24431600 100644
--- a/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
+++ b/src/ImageSharp/Formats/Webp/Lossless/LosslessUtils.cs
@@ -81,7 +81,9 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossless
         {
             int matchLen = 0;
 
-            while (matchLen < length && array1[matchLen] == array2[matchLen])
+            ref uint array1Ref = ref MemoryMarshal.GetReference(array1);
+            ref uint array2Ref = ref MemoryMarshal.GetReference(array2);
+            while (matchLen < length && Unsafe.Add(ref array1Ref, matchLen) == Unsafe.Add(ref array2Ref, matchLen))
             {
                 matchLen++;
             }