Add PNG benchmarks

Author: Shane32

QRCoderBenchmarks/PngByteQRCode.cs

@@ -0,0 +1,50 @@
+using BenchmarkDotNet.Attributes;
+using QRCoder;
+
+namespace QRCoderBenchmarks;
+
+[MemoryDiagnoser]
+public class PngByteQRCodeBenchmark
+{
+    private readonly Dictionary<string, QRCodeData> _samples;
+
+    public PngByteQRCodeBenchmark()
+    {
+        var eccLvl = QRCoder.QRCodeGenerator.ECCLevel.L;
+        _samples = new Dictionary<string, QRCodeData>()
+        {
+            { "small", QRCoder.QRCodeGenerator.GenerateQrCode("ABCD", eccLvl) },
+            { "medium", QRCoder.QRCodeGenerator.GenerateQrCode("https://github.com/codebude/QRCoder/blob/f89aa90081f369983a9ba114e49cc6ebf0b2a7b1/QRCoder/Framework4.0Methods/Stream4Methods.cs", eccLvl) },
+            { "big", QRCoder.QRCodeGenerator.GenerateQrCode( new string('a', 2600), eccLvl) }
+        };
+    }
+
+
+    [Benchmark]
+    public void RenderPngByteQRCodeSmall()
+    {
+        var qrCode = new PngByteQRCode(_samples["small"]);
+        _ = qrCode.GetGraphic(10);
+    }
+
+    [Benchmark]
+    public void RenderPngByteQRCodeMedium()
+    {
+        var qrCode = new PngByteQRCode(_samples["medium"]);
+        _ = qrCode.GetGraphic(10);
+    }
+
+    [Benchmark]
+    public void RenderPngByteQRCodeBig()
+    {
+        var qrCode = new PngByteQRCode(_samples["big"]);
+        _ = qrCode.GetGraphic(10);
+    }
+
+    [Benchmark]
+    public void RenderPngByteQRCodeHuge()
+    {
+        var qrCode = new PngByteQRCode(_samples["big"]);
+        _ = qrCode.GetGraphic(50);
+    }
+}