From c363c354fd7d87a7ec0a100dd4f2e055f2f02cfd Mon Sep 17 00:00:00 2001
From: rameel <rameel-b@hotmail.com>
Date: Tue, 22 Apr 2025 19:17:02 +0500
Subject: [PATCH] Remove redundant 'freeList' field

---
 .../System/Linq/Parallel/Utils/HashLookup.cs   | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/src/libraries/System.Linq.Parallel/src/System/Linq/Parallel/Utils/HashLookup.cs b/src/libraries/System.Linq.Parallel/src/System/Linq/Parallel/Utils/HashLookup.cs
index 08ac4fa0995abf..f70eb86911d789 100644
--- a/src/libraries/System.Linq.Parallel/src/System/Linq/Parallel/Utils/HashLookup.cs
+++ b/src/libraries/System.Linq.Parallel/src/System/Linq/Parallel/Utils/HashLookup.cs
@@ -22,7 +22,6 @@ internal sealed class HashLookup<TKey, TValue>
         private int[] buckets;
         private Slot[] slots;
         private int count;
-        private int freeList;
         private readonly IEqualityComparer<TKey>? comparer;
 
         private const int HashCodeMask = 0x7fffffff;
@@ -36,7 +35,6 @@ internal HashLookup(IEqualityComparer<TKey>? comparer)
             this.comparer = comparer;
             buckets = new int[7];
             slots = new Slot[7];
-            freeList = -1;
         }
 
         // If value is not in set, add it and return true; otherwise return false
@@ -97,18 +95,10 @@ private bool Find(TKey key, bool add, bool set, [MaybeNullWhen(false)] ref TValu
 
             if (add)
             {
-                int index;
-                if (freeList >= 0)
-                {
-                    index = freeList;
-                    freeList = slots[index].next;
-                }
-                else
-                {
-                    if (count == slots.Length) Resize();
-                    index = count;
-                    count++;
-                }
+                if (count == slots.Length) Resize();
+
+                int index = count;
+                count++;
 
                 int bucket = hashCode % buckets.Length;
                 slots[index].hashCode = hashCode;