Adaptive Work-Efficient Connected Components on the GPU
  This report presents an adaptive work-efficient approach for implementing the Connected Components algorithm on GPUs. The results show a considerable increase in performance (up to 6.8$\times$) over current state-of-the-art solutions. 
Michael Sutton, Tal Ben-Nun, Amnon Barak, Sreepathi Pai, Keshav   Pingali
cs.DC cs.DS