Adding Text To Existing Image,How should I optimize my code?

[xiranyu]

This code took 1000ms

       using (var image = new MagickImage(sourceImgPath))
        {
            using (var caption = new MagickImage($"caption:{text}", readSettings))
            {
                image.Composite(caption, x1, y1, CompositeOperator.Over);
            }

            image.Write(newImgPath);
        }

This code took 2000ms

       using (var image = new MagickImage(sourceImgPath))
        {
            using (var caption = new MagickImage($"caption:{text}", readSettings))
            {
                image.Composite(caption, x1, y1, CompositeOperator.Over);
            }

            using (var caption = new MagickImage($"caption:{text2}", readSettings))
            {
                image.Composite(caption, x2, y2, CompositeOperator.Over);
            }

            image.Write(newImgPath);
        }

Is there any way to optimize it? thanks.

[dlemstra]

The drawing code is not very performant because it does a lot of checks to get the best output. I don't think you can do anything to optimize this. You are probably drawing a lot of information on the image.