Buffered Decoding.

src/ImageSharp/Formats/Png/PngEncoder.cs

@@ -72,13 +72,11 @@ public void Encode<TPixel>(Image<TPixel> image, Stream stream)
         /// <param name="image">The <see cref="Image{TPixel}"/> to encode from.</param>
         /// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
         /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
-        public async Task EncodeAsync<TPixel>(Image<TPixel> image, Stream stream)
+        public Task EncodeAsync<TPixel>(Image<TPixel> image, Stream stream)
             where TPixel : unmanaged, IPixel<TPixel>
         {
-            using (var encoder = new PngEncoderCore(image.GetMemoryAllocator(), image.GetConfiguration(), new PngEncoderOptions(this)))
-            {
-                await encoder.EncodeAsync(image, stream).ConfigureAwait(false);
-            }
+            using var encoder = new PngEncoderCore(image.GetMemoryAllocator(), image.GetConfiguration(), new PngEncoderOptions(this));
+            return encoder.EncodeAsync(image, stream);
         }
     }
 }

src/ImageSharp/Image.cs

@@ -103,15 +103,15 @@ public void Save(Stream stream, IImageEncoder encoder)
         /// </summary>
         /// <param name="stream">The stream to save the image to.</param>
         /// <param name="encoder">The encoder to save the image with.</param>
-        /// <exception cref="System.ArgumentNullException">Thrown if the stream or encoder is null.</exception>
+        /// <exception cref="ArgumentNullException">Thrown if the stream or encoder is null.</exception>
         /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
-        public async Task SaveAsync(Stream stream, IImageEncoder encoder)
+        public Task SaveAsync(Stream stream, IImageEncoder encoder)
         {
             Guard.NotNull(stream, nameof(stream));
             Guard.NotNull(encoder, nameof(encoder));
             this.EnsureNotDisposed();
 
-            await this.AcceptVisitorAsync(new EncodeVisitor(encoder, stream)).ConfigureAwait(false);
+            return this.AcceptVisitorAsync(new EncodeVisitor(encoder, stream));
         }
 
         /// <summary>
@@ -179,9 +179,8 @@ public EncodeVisitor(IImageEncoder encoder, Stream stream)
             public void Visit<TPixel>(Image<TPixel> image)
                 where TPixel : unmanaged, IPixel<TPixel> => this.encoder.Encode(image, this.stream);
 
-            public async Task VisitAsync<TPixel>(Image<TPixel> image)
-                where TPixel : unmanaged, IPixel<TPixel>
-                => await this.encoder.EncodeAsync(image, this.stream).ConfigureAwait(false);
+            public Task VisitAsync<TPixel>(Image<TPixel> image)
+                where TPixel : unmanaged, IPixel<TPixel> => this.encoder.EncodeAsync(image, this.stream);
         }
     }
 }