Sandbox code & results

tests/ImageSharp.Tests.ProfilingSandbox/Program.cs

@@ -2,6 +2,9 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
+using System.Diagnostics;
+using System.IO;
+using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Tests.Formats.Jpg;
 using SixLabors.ImageSharp.Tests.PixelFormats.PixelOperations;
 using SixLabors.ImageSharp.Tests.ProfilingBenchmarks;
@@ -31,14 +34,88 @@ namespace SixLabors.ImageSharp.Tests.ProfilingSandbox
         /// </param>
         public static void Main(string[] args)
         {
-            LoadResizeSaveParallelMemoryStress.Run();
+            /* Master */
-            // RunJpegEncoderProfilingTests();
+            // Elapsed: 5431ms across 200 iterations
-            // RunJpegColorProfilingTests();
+            // Average: 27,155ms
-            // RunDecodeJpegProfilingTests();
+
-            // RunToVector4ProfilingTest();
+            /* Inserting stuff bytes later */
-            // RunResizeProfilingTest();
+            // Elapsed: 5300ms across 200 iterations
-
+            // Average: 26,5ms
-            // Console.ReadLine();
+
+            /* Flush if check */
+            // Elapsed: 5209ms across 200 iterations
+            // Average: 26,045ms
+
+            /* [INVALID] int32 flush - invalid flush order */
+            // Elapsed: 4784ms across 200 iterations
+            // Average: 23,92ms
+
+            /* int32 flush - correct flush order */
+            // Elapsed: 5049ms across 200 iterations
+            // Average: 25,245ms
+
+            /* int32 flush - identical file output */
+            // Elapsed: 4800ms across 200 iterations
+            // Average: 24.00ms
+
+            /* int32 flush - optimized huffman storage & reduced instructions per Emit() */
+            // Elapsed: 4680ms across 200 iterations
+            // Average: 23,4ms
+
+            /* int32 flush - merged prefix & value Emit() call */
+            // Elapsed: 4644ms across 200 iterations
+            // Average: 23,22ms
+
+            BenchmarkEncoder("uniform_size", 200, 100);
+
+            //ReEncodeImage("uniform_size", 100);
+
+            Console.WriteLine("Done.");
+        }
+
+        const string pathTemplate = "C:\\Users\\pl4nu\\Downloads\\{0}.jpg";
+
+        private static void BenchmarkEncoder(string fileName, int iterations, int quality)
+        {
+            string loadPath = String.Format(pathTemplate, fileName);
+
+            using var saveStream = new MemoryStream();
+
+            var decoder = new JpegDecoder { IgnoreMetadata = true };
+            using Image img = decoder.Decode(Configuration.Default, new FileStream(loadPath, FileMode.Open));
+
+            var encoder = new JpegEncoder()
+            {
+                Quality = quality,
+                ColorType = JpegColorType.YCbCr,
+                Subsample = JpegSubsample.Ratio444
+            };
+
+            Stopwatch sw = new Stopwatch();
+            sw.Start();
+            for (int i = 0; i < iterations; i++)
+            {
+                img.SaveAsJpeg(saveStream, encoder);
+                saveStream.Position = 0;
+            }
+            sw.Stop();
+
+            Console.WriteLine($"// Elapsed: {sw.ElapsedMilliseconds}ms across {iterations} iterations\n// Average: {(double)sw.ElapsedMilliseconds / iterations}ms");
+        }
+
+        private static void ReEncodeImage(string fileName, int quality)
+        {
+            string loadPath = String.Format(pathTemplate, fileName);
+            using Image img = Image.Load(loadPath);
+
+            string savePath = String.Format(pathTemplate, $"testSave_{fileName}");
+            var encoder = new JpegEncoder()
+            {
+                Quality = quality,
+                ColorType = JpegColorType.YCbCr,
+                Subsample = JpegSubsample.Ratio444
+            };
+            img.SaveAsJpeg(savePath, encoder);
         }
 
         private static void RunJpegEncoderProfilingTests()