use Stream.ReadAsync(Memory) if available

smdn · Feb 4, 2022 · 7c52a62 · 7c52a62
1 parent 7895451
commit 7c52a62
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/Smdn.Fundamental.Stream/Smdn.IO/StreamExtensions.cs b/src/Smdn.Fundamental.Stream/Smdn.IO/StreamExtensions.cs
@@ -68,7 +68,13 @@ async Task CopyToAsyncCore()
       var buffer = new byte[bufferSize]; // TODO: array pool
 
       for (; ; ) {
-        var read = await stream.ReadAsync(buffer, 0, bufferSize, cancellationToken).ConfigureAwait(false);
+        var read =
+#if SYSTEM_IO_STREAM_READASYNC_MEMORY_OF_BYTE
+          await stream.ReadAsync(buffer.AsMemory(0, bufferSize), cancellationToken)
+#else
+          await stream.ReadAsync(buffer, 0, bufferSize, cancellationToken)
+#endif
+          .ConfigureAwait(false);
 
         if (read <= 0)
           break;