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Dijkstra algorithm is not improved in terms of space and time-complexity, the algorithm is muddled to apply in network analysis for enormous test cases. To handle this huge time complexity, advanced structures are applied to enhance Dijkstra algorithm. The use of a keen and numerical procedure speeds up the enhanced Dijkstra by multiple times. In this paper four approaches using advanced data structures like linked list, Fibonacci heap, binary heap and bi-directional Dijkstra are applied and their performance is also analyzed and compared on two classes of graphs, dense and sparse graphs.
Verma et al. (Fri,) studied this question.