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This PR includes two performance improvements. 1. Take advantage of hyper sparsity while computing reduced costs in dual pushes in crossover code. This optimization improves the root relaxation solve significantly in some problems. For example: cod105, dano3_5. 2. Optimize right looking lu by replacing the linear degree bucket search with O(1) search. This optimization speeds up some of the hardest problems (root relaxation of MIP). For example: ``` chromaticindex1024(30%) cod105 (50%) k1mushroom (28%) splice1k1 (63%) supportcase26 (51%) ``` There are some regressions as well, but they are already solved in milliseconds. ## Issue Authors: - Rajesh Gandham (https://github.com/rg20) Approvers: - Chris Maes (https://github.com/chris-maes) URL: #948
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SUCCESS - forward-merge complete. |
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Forward-merge triggered by push to release/26.04 that creates a PR to keep main up-to-date. If this PR is unable to be immediately merged due to conflicts, it will remain open for the team to manually merge. See forward-merger docs for more info.