TIFF loading performance is very low

Prerequisites

• I have written a descriptive issue title
• I have verified that I am using the latest version of Magick.NET
• I have searched open and closed issues to ensure it has not already been reported

Description

When loading a large (10mb) TIFF image, creating the MagickImage object takes roughly 1200ms on my machine (still around ~1000 using the OpenMP version); vs the sub 20ms it takes with System.Imaging on my machine. This is weird because in my experience the ImageMagick JPEG decompressor for instance systematically performs better than Microsoft’s libraries while keeping in the same order of magnitude. Here we’re talking 2 orders of magnitude difference which leads me to believe something is wrong.

Steps to Reproduce

I have zipped and uploaded the image here for convenience

string imgLocationTIFF = @"c:\path\to\image.tif";
Bitmap bmp;
ImageMagick.MagickImage imgM;
Image img;
Stopwatch stopwatch = new Stopwatch();

stopwatch.Start();
imgM = new ImageMagick.MagickImage(imgLocationTIFF);
bmp = imgM.ToBitmap();
stopwatch.Stop();
rtfBox.Text += String.Format("ImageMagick TIFF: {0}\r\n", stopwatch.ElapsedMilliseconds);

stopwatch = new Stopwatch();
stopwatch.Start();
img = Image.FromFile(imgLocationTIFF);
bmp = (Bitmap)img;
stopwatch.Stop();
rtfBox.Text += String.Format("Microsoft TIFF: {0}\r\n", stopwatch.ElapsedMilliseconds);

Produces:

Magick.NET-Q8-x64
ImageMagick TIFF: 1376
Microsoft TIFF: 13

Magick.NET-Q8-OpenMP-x64
ImageMagick TIFF: 927
Microsoft TIFF: 12

I have tried “helping” the lib by doing

imgM = new ImageMagick.MagickImage(System.IO.File.ReadAllBytes(imgLocationTIFF), ImageMagick.MagickFormat.Tif);

But the results are the same

System Configuration

• Magick.NET version: Magick.NET-Q8-OpenMP-x64 and non-OpenMP 7.17.0.1
• Environment (Operating system, version and so on): Win10, i7700k, 16GB ram
• Additional information:

[dlemstra]

Make sure you keep the copyright header when you integrate those file. Will close this issue now.

p.s. I noticed that you also committed the folder packages in your project. It is a binary folder that you want to include in the .gitignore list.

[tonyp7]

Alright that makes sense. I’ll integrate the System.Drawing codebase directly into my project to avoid distributing additional DLLs but otherwise I think you can close this issue if nothing else is expected!