From 2168071e703a9b26f16161061e99eb7fa4cfc764 Mon Sep 17 00:00:00 2001
From: Anton Firszov <antonfir@gmail.com>
Date: Fri, 19 Apr 2019 23:07:32 +0200
Subject: [PATCH] moar unsafe optimization

---
 .../Processing/Processors/Transforms/Resize/ResizeWorker.cs  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
index 9b7d1d17c6..7fe2638802 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs
@@ -123,10 +123,13 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
                 int top = kernel.StartIndex - this.currentWindow.Min;
 
+                ref Vector4 fpBase = ref this.transposedFirstPassBuffer.Span[top];
+
                 for (int x = 0; x < this.destWidth; x++)
                 {
                     // Span<Vector4> firstPassColumn = this.GetColumnSpan(x).Slice(top);
-                    ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
+                    // ref Vector4 firstPassColumnBase = ref this.GetColumnSpan(x)[top];
+                    ref Vector4 firstPassColumnBase = ref Unsafe.Add(ref fpBase, x * this.workerHeight);
 
                     // Destination color components
                     Unsafe.Add(ref tempRowBase, x) = kernel.ConvolveCore(ref firstPassColumnBase);