Worked on enhancing performance monitoring in the denoland/deno repository by implementing the performance.timerify() function within the node:perf_hooks module. This addition enabled developers to measure function execution times directly, addressing a previously unimplemented feature and resolving a long-standing gap in timing utilities. The approach aligned perf_hooks timing capabilities with established Node.js conventions, improving cross-runtime diagnostics and benchmarking. The work was delivered as a PR-ready change with clear issue linkage, contributing to faster debugging and operational visibility. JavaScript and Node.js were used throughout, with a focus on performance optimization and testing to ensure robust and reliable runtime performance measurement.