ImageMagick vs GD - which is faster, less resource intensive and produces better images?

I need to choose between either ImageMagick or GD library for the following image manipulation tasks:

• resizing images into multiple sizes
• watermarking images

As you can see I don't need anything fancy. I'm sure both these tools can achieve them, so if one has more extra features than the other, I don't really care about.

My main concern is performance and quality. Which of these 2 tools consumes less resources, is faster and produces better quality images?

P.S. I need to use it with their respective PHP APIs.

Solution 1:

I would lean towards ImageMagick as far as image quality goes. It seems to produce considerably sharper/higher-quality images than GD2 (at the expense of larger filesize.)

ImageMagick is also not bound by PHP's memory limit.

Solution 2:

If in doubt, use ImageMagick. I haven't observed any big differences in speed and resource usage, but IM is way more flexible, better in quality in many areas (although you can expect decent results in watermarking from both libraries), and supports way more formats.

Many advanced operations that are complex or impossible to achieve with GD are easy to do with ImageMagick.

On the other hand, ImageMagick is not supported as well as GD by many hosting providers, so you'd be adding a sizeable dependency. Depending on the nature of your project, that may or may not be a problem.