Add Dynamic Exploration Graph (DEG) #613
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The Dynamic Exploration Graph (DEG) [1] is designed for evolving datasets; nevertheless, it outperforms HNSW, NSG, and others in static settings. This pull request adds DEG with a single set of build parameters suggested by the authors. While the repository [2] also includes code for the continuous refining Exploration Graph (crEG) [3], its search performance is similar to DEG. crEG offers only the additional advantage of being multithreaded, which is irrelevant for this benchmark.
[1] https://link.springer.com/chapter/10.1007/978-981-96-2054-8_25
[2] https://github.com/Visual-Computing/DynamicExplorationGraph
[3] https://doi.org/10.1145/3652583.3658117