Ahmar Suhail enabled vectored IO by default for Parquet read operations in the apache/parquet-java repository, aiming to improve read throughput and latency for large datasets. By updating the system default for useHadoopVectoredIo in a focused, single-commit change, Ahmar ensured minimal disruption to the codebase while making performance optimization accessible to all users. The work leveraged Java and file I/O expertise, emphasizing efficient data access patterns. Although the contribution was limited to one feature over a month, the targeted approach addressed a clear performance bottleneck and demonstrated a practical understanding of system defaults and their impact on real-world workloads.