From 9676ee74859cebcde7885cffb9d4554ac1a380c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Lema=C5=84czyk?= <marek@lemanczyk.eu>
Date: Fri, 3 Mar 2023 01:33:41 +0100
Subject: [PATCH] Performance improvement for low no. of items

---
 Recyclable.Collections/RecyclableList.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Recyclable.Collections/RecyclableList.cs b/Recyclable.Collections/RecyclableList.cs
index 2007beb..da48779 100644
--- a/Recyclable.Collections/RecyclableList.cs
+++ b/Recyclable.Collections/RecyclableList.cs
@@ -516,6 +516,11 @@ namespace Recyclable.Collections
 				return false;
 			}
 
+			if (_lastBlockIndex == 0 || (_lastBlockIndex == 1 && _nextItemIndex == 0))
+			{
+				return Array.IndexOf(_memoryBlocks[0], item, 0, (int)_longCount) >= 0;
+			}
+
 			Span<T[]> memoryBlocksSpan = new(_memoryBlocks);
 			int lastBlockIndex = _lastBlockIndex;
 			for (int blockIndex = 0; blockIndex < lastBlockIndex; blockIndex++)