Emily Yang developed a performance optimization for large monorepos in the microsoft/git repository by implementing a Commit Graph Bloom Filter Toggle. She introduced a new configuration option, commitGraph.changedPaths, allowing users to enable or disable changed-path Bloom filters during commit-graph writes. This approach, built with C programming and shell scripting, reduced history computation time and improved both developer productivity and CI throughput. Emily ensured backward compatibility by preserving existing CLI behaviors and defaults, while aligning the feature with Scalar recommendations for large repositories. She documented the changes thoroughly to support maintainability and facilitate adoption within teams using version control.