diff --git a/AsyncKeyedLock/AsyncKeyedLock.csproj b/AsyncKeyedLock/AsyncKeyedLock.csproj
index e864bb7..9ee5fa8 100644
--- a/AsyncKeyedLock/AsyncKeyedLock.csproj
+++ b/AsyncKeyedLock/AsyncKeyedLock.csproj
@@ -7,16 +7,16 @@
 		<RepositoryUrl>https://github.com/MarkCiliaVincenti/AsyncKeyedLock.git</RepositoryUrl>
 		<PackageProjectUrl>https://github.com/MarkCiliaVincenti/AsyncKeyedLock</PackageProjectUrl>
 		<PackageLicenseFile>LICENSE</PackageLicenseFile>
-		<Version>5.0.3</Version>
+		<Version>5.0.4</Version>
 		<PackageIcon>logo.png</PackageIcon>
-		<PackageReleaseNotes>Minor performance enhancements.</PackageReleaseNotes>
+		<PackageReleaseNotes>Added pool initial fill to allow overriding of the initial number of items in the pool (defaults to the pool size).</PackageReleaseNotes>
 		<Description>An asynchronous .NET Standard 2.0 library that allows you to lock based on a key (keyed semaphores), limiting concurrent threads sharing the same key to a specified number.</Description>
 		<Copyright>© 2022 Mark Cilia Vincenti</Copyright>
 		<PackageTags>async,lock,key,semaphore,dictionary,pooling,duplicate</PackageTags>
 		<RepositoryType>git</RepositoryType>
 		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-		<AssemblyVersion>5.0.3.0</AssemblyVersion>
-		<FileVersion>5.0.3.0</FileVersion>
+		<AssemblyVersion>5.0.4.0</AssemblyVersion>
+		<FileVersion>5.0.4.0</FileVersion>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
 		<IsPackable>true</IsPackable>
 		<IsTrimmable>true</IsTrimmable>
diff --git a/AsyncKeyedLock/AsyncKeyedLockOptions.cs b/AsyncKeyedLock/AsyncKeyedLockOptions.cs
index 898d911..1f47b73 100644
--- a/AsyncKeyedLock/AsyncKeyedLockOptions.cs
+++ b/AsyncKeyedLock/AsyncKeyedLockOptions.cs
@@ -15,15 +15,22 @@ public sealed class AsyncKeyedLockOptions
         /// </summary>
         public int PoolSize { get; set; } = 0;
 
+        /// <summary>
+        /// The number of items to fill the pool with during initialization. Defaults to -1 (fill up to pool size).
+        /// </summary>
+        public int PoolInitialFill { get; set; } = -1;
+
         /// <summary>
         /// Initializes options for the <see cref="AsyncKeyedLocker"/> constructors
         /// </summary>
         /// <param name="maxCount">The maximum number of requests for the semaphore that can be granted concurrently. Defaults to 1.</param>
         /// <param name="poolSize">The size of the pool to use in order for generated objects to be reused. Defaults to 0 (disabled).</param>
-        public AsyncKeyedLockOptions(int maxCount = 1, int poolSize = 0)
+        /// <param name="poolInitialFill">The number of items to fill the pool with during initialization. Defaults to -1 (fill up to pool size).</param>
+        public AsyncKeyedLockOptions(int maxCount = 1, int poolSize = 0, int poolInitialFill = -1)
         {
             MaxCount = maxCount;
             PoolSize = poolSize;
+            PoolInitialFill = poolInitialFill;
         }
     }
 }
\ No newline at end of file
diff --git a/AsyncKeyedLock/AsyncKeyedLockPool.cs b/AsyncKeyedLock/AsyncKeyedLockPool.cs
index 486d003..35a3413 100644
--- a/AsyncKeyedLock/AsyncKeyedLockPool.cs
+++ b/AsyncKeyedLock/AsyncKeyedLockPool.cs
@@ -9,13 +9,23 @@ internal sealed class AsyncKeyedLockPool<TKey>
         private readonly BlockingCollection<AsyncKeyedLockReleaser<TKey>> _objects;
         private readonly Func<TKey, AsyncKeyedLockReleaser<TKey>> _objectGenerator;
 
-        public AsyncKeyedLockPool(Func<TKey, AsyncKeyedLockReleaser<TKey>> objectGenerator, int capacity)
+        public AsyncKeyedLockPool(Func<TKey, AsyncKeyedLockReleaser<TKey>> objectGenerator, int capacity, int initialFill = -1)
         {
             _objects = new BlockingCollection<AsyncKeyedLockReleaser<TKey>>(new ConcurrentBag<AsyncKeyedLockReleaser<TKey>>(), capacity);
             _objectGenerator = objectGenerator;
-            for (int i = 0; i < capacity; ++i)
+            if (initialFill < 0)
             {
-                _objects.Add(_objectGenerator(default));
+                for (int i = 0; i < capacity; ++i)
+                {
+                    _objects.Add(_objectGenerator(default));
+                }
+            }
+            else
+            {
+                for (int i = 0; i < initialFill; ++i)
+                {
+                    _objects.Add(_objectGenerator(default));
+                }
             }
         }
 
diff --git a/README.md b/README.md
index 06b91f7..714a1d2 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,12 @@ Setting the pool size can be done via the `AsyncKeyedLockOptions` in one of the
 var asyncKeyedLocker = new AsyncKeyedLocker<string>(new AsyncKeyedLockOptions(poolSize: 100));
 ```
 
+You can also set the initial pool fill (by default this is set to the pool size):
+
+```csharp
+var asyncKeyedLocker = new AsyncKeyedLocker<string>(new AsyncKeyedLockOptions(poolSize: 100, poolInitialFill: 50));
+```
+
 ### Locking
 ```csharp
 using (var lockObj = await asyncKeyedLocker.LockAsync(myObject))