Worked on performance optimization for the FuelLabs/fuel-vm repository by refining memory allocation strategies in Rust. Focused on pre-allocating vectors using Vec::with_capacity within the fuel-merkle and fuel-tx components, this approach reduced unnecessary reallocations and improved both throughput and latency under load. The changes targeted specific files, including merkle_tree.rs and metadata.rs, and maintained existing functionality while enhancing memory management and scalability. Comprehensive in-code documentation and detailed commit messages explained the rationale and scope of the optimization. The work demonstrated a strong understanding of performance tuning and memory management, with measurable improvements in efficiency and maintainability for the project.