CHANGED TO MIRROR

Assets/Mirror/Runtime/NetworkWriterPool.cs

@@ -0,0 +1,41 @@
+using System;
+
+namespace Mirror
+{
+    /// <summary>Pooled NetworkWriter, automatically returned to pool when using 'using'</summary>
+    public sealed class PooledNetworkWriter : NetworkWriter, IDisposable
+    {
+        public void Dispose() => NetworkWriterPool.Recycle(this);
+    }
+
+    /// <summary>Pool of NetworkWriters to avoid allocations.</summary>
+    public static class NetworkWriterPool
+    {
+        // reuse Pool<T>
+        // we still wrap it in NetworkWriterPool.Get/Recycle so we can reset the
+        // position before reusing.
+        // this is also more consistent with NetworkReaderPool where we need to
+        // assign the internal buffer before reusing.
+        static readonly Pool<PooledNetworkWriter> Pool = new Pool<PooledNetworkWriter>(
+            () => new PooledNetworkWriter(),
+            // initial capacity to avoid allocations in the first few frames
+            // 1000 * 1200 bytes = around 1 MB.
+            1000
+        );
+
+        /// <summary>Get a writer from the pool. Creates new one if pool is empty.</summary>
+        public static PooledNetworkWriter GetWriter()
+        {
+            // grab from pool & reset position
+            PooledNetworkWriter writer = Pool.Take();
+            writer.Reset();
+            return writer;
+        }
+
+        /// <summary>Return a writer to the pool.</summary>
+        public static void Recycle(PooledNetworkWriter writer)
+        {
+            Pool.Return(writer);
+        }
+    }
+}