Datadog fosters a culture of performance optimization by encouraging its engineering teams to identify and share cost-saving opportunities, which has resulted in a significant $17.5 million reduction in annual cloud expenses. This culture is supported by tools like Cloud Cost Management (CCM), Continuous Profiler, and Network Performance Monitoring (NPM), which help engineers visualize cloud spend, optimize resource usage, and identify hidden network costs. CCM provides detailed cost data, enabling engineers to estimate potential savings and monitor the impact of optimizations, while the Continuous Profiler helps optimize CPU and memory usage by breaking down service performance metrics. NPM offers insights into network traffic and inter-service interactions to uncover costly inefficiencies, such as data transfers across availability zones. Through these efforts, Datadog not only celebrates its engineers' achievements but also promotes systemic improvement and accountability across its teams, ultimately enhancing both product performance and cost efficiency.