Worked on the mrdoob/three.js repository to enhance the accuracy of rendering performance metrics by addressing a specific bug in the WebGLRenderer statistics flow. Implemented a targeted fix in JavaScript that resets rendering statistics before the shadow map rendering process, preventing metric carryover between frames and ensuring precise per-frame observability. This adjustment improved the reliability of performance dashboards and streamlined debugging for rendering issues, directly supporting faster root-cause analysis. The solution demonstrated a focused approach to performance optimization and rendering within the WebGL context, delivering a minimal, risk-contained change that addressed a traceable issue without introducing broader codebase impact.