Image stitching takes a lot of time and memory to fail

edit

I have the following two images that I want to stitch:

http://i68.tinypic.com/s15e09.jpg

http://i64.tinypic.com/1zwgppg.jpg

I have compiled the default code provided :

https://github.com/opencv/opencv/blob...

Just supplying the images to the binary file keeps consuming a lot of memory and freezes my system.

I tried the above images with --warp fisheye which doesn't consume a lot of memory bu just keeps waiting to provide an output.

Is there a proper theory of how to stitch a list of images with overlapping parts?