This is a demo of Sentry's Custom Performance Metrics and how to query them in both Discover and Dashboard pages. Custom Performance Metrics are measurements attached to Sentry a transaction just like FCP or LCP, but with the major difference being that they're defined by the user rather than Sentry.

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Custom Performance Metrics Docs: https://bit.ly/3DOvymV
JavaScript Custom Metrics Docs: https://bit.ly/3C412E
Python Custom Metrics Docs: https://bit.ly/3SuJKpy