GD versus ImageMagic Resizing an Image

gd-bench.c

#include "gd.h"

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <dirent.h>
#include <errno.h>
#include <sys/fcntl.h>
#include <time.h>
#include <ctype.h>

int main () {
	char *fname = "/home/joseph/Pictures/1291237588319.jpg";
	FILE *infile = fopen(fname, "rb");
	gdImagePtr src_im = gdImageCreateFromJpeg(infile);

	if (src_im != NULL) {
		gdImagePtr dest_im = gdImageCreateTrueColor(
			src_im->sx / 2, src_im->sy / 2
		);
		
		gdImageCopyResized(
			dest_im, src_im, 0, 0, 0, 0, 
			src_im->sx / 2, src_im->sy / 2,
			src_im->sx, src_im->sy
		);
		
		FILE *jpegout = fopen("foobar.jpg","wb+");
		gdImageJpeg(dest_im, jpegout, -1);
		fflush(jpegout);
		puts("We good :)");
		printf("%dx%d\n", src_im->sx, src_im->sy);
	}
	return 0;
}

magick-bench.c

#include <wand/MagickWand.h>

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <dirent.h>
#include <errno.h>
#include <sys/fcntl.h>
#include <time.h>
#include <ctype.h>

int main () {
	char *fname = "/home/joseph/Pictures/1291237588319.jpg";

	MagickWandGenesis();
	MagickWand *magick_wand=NewMagickWand();
	MagickBooleanType status=MagickReadImage(magick_wand, fname);
	if (status != MagickFalse) {
		MagickResetIterator(magick_wand);
		while (MagickNextImage(magick_wand) != MagickFalse) {
			 MagickSampleImage(magick_wand,1650,1056);
		 }
		status=MagickWriteImages(magick_wand,"foobar2.jpg",MagickTrue);
		magick_wand=DestroyMagickWand(magick_wand);
		MagickWandTerminus();
	}
	return 0;
}

Makefile

all:
	gcc gd-bench.c -lgd -o gd-bench
	gcc `MagickWand-config --cflags --cppflags` magick-bench.c -o magick-bench `MagickWand-config --ldflags --libs`
	time ./gd-bench
	time ./magick-bench
#GD is faster 29% faster