Strobelight is a new profiling service designed to analyze performance in applications, utilizing open source technology. One notable use case involved a performance engineer identifying inefficient array copies in a C++ codebase, which resulted in significant server capacity savings after making a minor code change. The service is associated with Meta, and teams are actively working to make more features available through the open-source framework Parca and a commercial product from Polar Signals. The community response has been generally positive, highlighting the potential competitiveness of Strobelight against major service providers by addressing a gap in machine-level monitoring tools. There are also discussions on alternative profiling tools and the general effectiveness of such performance optimization strategies.