Performance is Sentry's new code performance monitoring offering that provides deeper visibility into API calls and database queries, helping developers deliver fast customer experiences with just five lines of code. It offers features such as User Misery, which pairs industry metrics with user metrics to identify slow APIs and improve troubleshooting, Mission-critical Context, which surfaces transactions by duration time, related code errors, and impact on the customer, and Untangle Tracing, which traces frontend back to its API calls and slow database queries. The tool helps developers resolve user misery by getting out in front of painful experiences before they become problems and problems before they cause customers to churn. It is designed to help developers deliver performant and reliable software and has been used successfully by companies such as Tackle and SmugMug.