See slow faster with Performance.

Your application’s success depends on how quickly you find what’s slowing things down. Performance, Sentry’s client-side performance monitoring for Python and JavaScript, gives your team the full-stack visibility it needs to iterate faster, take fewer risks, and ultimately, ship performant software.

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Five lines of code is all it takes.

With Performance, teams can trace slow-loading pages back to its API call as well as surface all related errors. Now Engineering Managers and Developers can resolve bottlenecks and deliver fast, reliable experiences that your customer demands.

Constant context.

Without real-time data, a customer’s pinwheeling Buy Now button can send your team into a panic spiral. With Apdex and Throughput data, you can see how your application responds to customers in real time. What’s more, Key Transactions prioritizes critical functions and callbacks so your team can focus on what matters most.

Untangle tracing.

Trace poor-performing pages not only to its API call but to its children. Performance’s event detail waterfall visualizes your customer’s experience from beginning to end, all while connecting user device data to its expected operation.

Prove improvement.

With performance monitoring, you can view transactions by slowest duration time, related issues, or the number of users — all in one consolidated view. And release markers add another layer of context so your team can gauge how customers react to code recently pushed to production.

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