Mael Lilensten developed two core features focused on enhancing performance monitoring in the DataDog/rum-events-format and DataDog/browser-sdk repositories. He implemented AddViewLoadingTime telemetry in the common schema to track view loading times, including properties for view availability and manual overrides, using TypeScript and telemetry best practices. In parallel, Mael introduced a public API in the browser-sdk that allows developers to manually report view loading times, supporting both automatic and manual measurement with last-call-wins logic and pre-initialization buffering. This work deepened performance insight capabilities and demonstrated a thoughtful approach to API design, front end development, and robust telemetry integration.