Developed an experimental memory-based allocation callback feature for the facebook/jemalloc repository, enabling dynamic program execution changes based on real-time memory usage. The work centered on the prof_threshold API, which offers lower overhead than existing sampling methods and supports use cases such as cache dropping and ahead-of-time out-of-memory prediction. Implementation involved creating new C source files and headers, updating the build system, and writing comprehensive unit tests to ensure robust integration. Detailed documentation was provided to clarify usage distinctions and performance characteristics. The project demonstrated expertise in C programming, memory management, and system programming, with a focus on performance optimization.