diff --git a/src/Servers/Kestrel/perf/PlatformBenchmarks/BufferWriter.cs b/src/Servers/Kestrel/perf/PlatformBenchmarks/BufferWriter.cs
index 9381fd9d76..c7d0893969 100644
--- a/src/Servers/Kestrel/perf/PlatformBenchmarks/BufferWriter.cs
+++ b/src/Servers/Kestrel/perf/PlatformBenchmarks/BufferWriter.cs
@@ -71,8 +71,7 @@ namespace PlatformBenchmarks
                 Commit();
             }
 
-            _output.GetMemory(count);
-            _span = _output.GetSpan();
+            _span = _output.GetSpan(count);
         }
 
         private void WriteMultiBuffer(ReadOnlySpan<byte> source)