multiply once and reuse

7 years ago · 8c14ec87de
1 changed files with 4 additions and 3 deletions
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@ -822,11 +822,12 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
            {
                for (int i = 0; i < componentCount; i++)
                {
-                    this.buffer[(3 * i) + 6] = (byte)(i + 1);
+                    int i3 = 3 * i;
+                    this.buffer[i3 + 6] = (byte)(i + 1);

                    // We use 4:2:0 chroma subsampling by default.
-                    this.buffer[(3 * i) + 7] = subsamples[i];
-                    this.buffer[(3 * i) + 8] = chroma[i];
+                    this.buffer[i3 + 7] = subsamples[i];
+                    this.buffer[i3 + 8] = chroma[i];
                }
            }