From 93d4ddd9cb7390c21d85e34b9314f9ede35048ae Mon Sep 17 00:00:00 2001
From: mlemanczyk <marek@lemanczyk.eu>
Date: Sat, 8 Jul 2023 14:54:24 +0200
Subject: [PATCH] Initial RecyclableList.AddRange performance improvements.
 Before cleanup.

---
 Recyclable.Collections/RecyclableList.cs | 27 ++++++++++++++++++------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/Recyclable.Collections/RecyclableList.cs b/Recyclable.Collections/RecyclableList.cs
index 4baf582..3c63f4e 100644
--- a/Recyclable.Collections/RecyclableList.cs
+++ b/Recyclable.Collections/RecyclableList.cs
@@ -264,21 +264,34 @@ namespace Recyclable.Collections
 		[MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.AggressiveOptimization)]
 		public void AddRange(IList<T> items)
 		{
-			if (items.Count == 0)
-			{
-				return;
-			}
+			// & WAS SLOWER
+			// if (items.Count == 0)
+			// {
+			// 	return;
+			// }
 
-			var sourceItemsCount = items.Count;
-			var targetCapacity = _count + sourceItemsCount;
+			// & WAS SLOWER
+			// var sourceItemsCount = items.Count;
+			var targetCapacity = _count + items.Count;
+			// & WAS SLOWER
+			// var targetCapacity = _count + sourceItemsCount;
+			// & WAS SLOWER
+			// if (_capacity < _count + items.Count)
+			// & WAS SLOWER
+			// if (_capacity < _count + sourceItemsCount)
 			if (_capacity < targetCapacity)
 			{
+				// & WAS SLOWER
+				// _ = RecyclableListHelpers<T>.EnsureCapacity(this, _count + items.Count);
 				_ = RecyclableListHelpers<T>.EnsureCapacity(this, targetCapacity);
+				// & WAS SLOWER
+				// _ = RecyclableListHelpers<T>.EnsureCapacity(this, _count + sourceItemsCount);
 			}
 
 			items.CopyTo(_memoryBlock, _count);
+			// & WAS SLOWER
+			// _count += items.Count;
 			_count = targetCapacity;
-
 			_version++;
 		}