Comment 3 for bug 375202

@pajarico: The advantages claimed by the GraphicsMagick project:

GraphicsMagick is originally derived from ImageMagick 5.5.2 as of November 2002 but has been completely independent of the ImageMagick project since then. Since the fork from ImageMagick many improvements have been made (see NEWS) by many authors using an open development model but without breaking the API or utilities operation.

Here are some reasons to prefer GraphicsMagick over ImageMagick:

        GM is more efficient so it gets the job done faster using fewer resources.
        GM is much smaller and lighter (3-5X smaller installation footprint).
        GM is used to process billions of files at the world's largest photo sites (e.g. Flickr and Etsy).
        GM does not conflict with other installed software.
        GM suffers from fewer security issues and exploits.
        GM valgrind's 100% clean (memcheck and helgrind).
        GM passes rigorous memory error testing using ASan_.
        GM comes with a comprehensive manual page.
        GM provides API and ABI stability and managed releases that you can count on.
        GM provides detailed yet comprehensible ChangeLog and NEWS files.
        GM is available for free, and may be used to support both open and proprietary applications.
        GM is distributed under an X11-style license (MIT License), approved by the Open Source Initiative, recommended for use by the OSSCC, and compatible with the GNU GPL.
        GM source code is managed in Mercurial, a distributed source control management tool which supports management of local changes.
        GM has 0.00 (zero) defects per 1000 lines of code (293,341 total lines included) according to Coverity analysis on May 25, 2015.
        GM developers contribute to other free projects for the public good.

(Source: http://www.graphicsmagick.org/)