Alban Dutilleul developed a backend throughput cost modeling capability for the xdslproject/xdsl repository, focusing on compiler design and performance analysis using Python. He introduced a cost model interface that leverages external tools such as LLVM-MCA to estimate the throughput of assembly-like code blocks, enabling more accurate backend scheduling and optimization decisions. Alban implemented a concrete MCABlockThroughputCostModel and integrated it into the backend framework, providing a foundation for data-driven performance analysis. He also created comprehensive tests to validate the model’s accuracy, ensuring robust integration and documentation. This work established essential infrastructure for future backend optimization efforts.