During March 2026, Nick Groszewski developed a Jaxpr equation counter feature for the jax-ml/jax repository, aimed at enhancing performance analysis by quantifying trace latency as a function of the number of equations processed. He implemented an iterative approach to equation counting during jaxpr construction, which reduced recursion and overhead, supporting scalable metrics gathering. To ensure reliability, Nick added comprehensive unit tests covering both flat and nested jaxpr structures, guarding against regressions. His work leveraged Python and focused on data analysis and performance optimization, resulting in a robust tool that enables more precise tracking and evaluation of trace latency in JAX.