Is Visual Odometry affected by the performance of the computer ?

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Hello,

I tried the /demo_rgbd http://wiki.ros.org/demo_rgbd on ROS indigo in order to do a visual odometry. Since, according to the KITTI website, this method is one of the best, i don't obtain good results...Lots of drifts and at the end the point of departure is far from the point of arrival. Even with the dataset provided by the authors, I got bad results whereas their video show good results.

I tried to understand why and except for the number of features maybe, i don't understand. And then, I wonder if the bad results can be influenced by the performance of the computer ? Indeed, according to the ROS wiki, they tell that they tested the algorithm with 4 core and almost 3GHz. My computer has only 2 core and 2.5 Ghz.

If yes, how i can improve the performance ?

Thank,