From 035672e7eaa6475e8f37f010e9408bfe045a6c9b Mon Sep 17 00:00:00 2001
From: mapogolions <ivanovpavelalex45@gmail.com>
Date: Sun, 26 Sep 2021 02:52:13 +0500
Subject: [PATCH] Prevent cache from being resized

---
 .../src/MemoryCache.cs                        | 32 ++++++++-----------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/src/libraries/Microsoft.Extensions.Caching.Memory/src/MemoryCache.cs b/src/libraries/Microsoft.Extensions.Caching.Memory/src/MemoryCache.cs
index c14e9f68f11086..c4c7f2562857b5 100644
--- a/src/libraries/Microsoft.Extensions.Caching.Memory/src/MemoryCache.cs
+++ b/src/libraries/Microsoft.Extensions.Caching.Memory/src/MemoryCache.cs
@@ -137,9 +137,19 @@ internal void SetEntry(CacheEntry entry)
                 priorEntry.SetExpired(EvictionReason.Replaced);
             }
 
-            bool exceedsCapacity = UpdateCacheSizeExceedsCapacity(entry);
+            if (entry.CheckExpired(utcNow))
+            {
+                entry.InvokeEvictionCallbacks();
+                if (priorEntry != null)
+                {
+                    RemoveEntry(priorEntry);
+                }
+                StartScanForExpiredItemsIfNeeded(utcNow);
+                return;
+            }
 
-            if (!entry.CheckExpired(utcNow) && !exceedsCapacity)
+            bool exceedsCapacity = UpdateCacheSizeExceedsCapacity(entry);
+            if (!exceedsCapacity)
             {
                 bool entryAdded = false;
 
@@ -192,22 +202,8 @@ internal void SetEntry(CacheEntry entry)
             }
             else
             {
-                if (exceedsCapacity)
-                {
-                    // The entry was not added due to overcapacity
-                    entry.SetExpired(EvictionReason.Capacity);
-
-                    TriggerOvercapacityCompaction();
-                }
-                else
-                {
-                    if (_options.SizeLimit.HasValue)
-                    {
-                        // Entry could not be added due to being expired, reset cache size
-                        Interlocked.Add(ref _cacheSize, -entry.Size.Value);
-                    }
-                }
-
+                entry.SetExpired(EvictionReason.Capacity);
+                TriggerOvercapacityCompaction();
                 entry.InvokeEvictionCallbacks();
                 if (priorEntry != null)
                 {