People say that ImageMagick is much faster. At best just compare both libraries and measure that.
- Prepare 1000 typical images.
- Write two scripts — one for GD, one
for ImageMagick. - Run both of them a few times.
- Compare results (total execution
time, CPU and I/O usage, result
image quality).
Something which the best everyone else, could not be the best for you.
Also, in my opinion, ImageMagick has much better API interface.